Signal processing method, device, chip and base station

Abstract

The present application proposes a signal processing method, a signal processing device, a chip, and a base station. A first signal is received from a baseband unit, and the first signal is mapped to M transmission channels, where M is less than or equal to the number of available transmission channels and / or the bandwidth used by the transmission channels is less than or equal to the bandwidth available for the transmission channels, and M is an integer greater than or equal to 1; and / or a second signal is received from a radio frequency unit and input into a receiving channel, and the signals output by N receiving channels are aggregated into a baseband signal, where N is less than or equal to the number of available receiving channels and / or the bandwidth used by the receiving channels is less than or equal to the bandwidth available for the receiving channels, and N is an integer greater than or equal to 1. This method can reduce resource overhead and power consumption of a multi-channel system.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a signal processing method, a signal processing device, a chip and a base station. Background Art

[0002] With the development of mobile communications, multi-antenna technology has become increasingly widespread. To support this technology, wireless terminals and base stations must provide multiple transmit and receive channels. In some application scenarios, such as Massive MIMO systems, a larger number of antennas may be used, necessitating a corresponding increase in transmit and receive channels. However, multi-channel systems such as Massive MIMO suffer from the challenges of high hardware resource overhead and power consumption due to the large number of transmit and receive channels. Summary of the Invention

[0003] The present application proposes a signal processing method, a signal processing device, a chip and a base station, which can reduce the resource overhead of a multi-channel system and reduce power consumption.

[0004] A first aspect of an embodiment of the present application provides a signal processing method, including: receiving a first signal from a baseband unit, mapping the first signal to M transmission channels, where M is less than or equal to the number of available transmission channels and / or the bandwidth used by the transmission channel is less than or equal to the bandwidth available for the transmission channel, and M is an integer greater than or equal to 1; and / or, receiving a second signal from a radio frequency unit and inputting it into a receiving channel, aggregating the signals output by N receiving channels into a baseband signal, where N is less than or equal to the number of available receiving channels and / or the bandwidth used by the receiving channel is less than or equal to the bandwidth available for the receiving channel, and N is an integer greater than or equal to 1.

[0005] By reducing the number of channels or the bandwidth used by the channels, the total amount of baseband output or input signals is reduced, the system resource overhead is reduced, and the power consumption is reduced.

[0006] In a possible implementation manner of the first aspect, a sum of bandwidths used by the M transmit channels is equal to a sum of bandwidths used by the N receive channels.

[0007] In a possible implementation manner of the first aspect, mapping the first signal to the M transmission channels includes: mapping the first signal to the M transmission channels according to a first mapping strategy.

[0008] In a possible implementation manner of the first aspect, the first mapping strategy includes M and / or a bandwidth used by a transmission channel.

[0009] In a possible implementation manner of the first aspect, the first mapping strategy is received from a baseband unit, or the first mapping strategy is locally configured.

[0010] In a possible implementation of the first aspect, aggregating the signals output by the N receiving channels into a baseband signal includes: aggregating the signals output by the N receiving channels into a baseband signal according to a second mapping strategy.

[0011] In a possible implementation manner of the first aspect, the second mapping strategy includes N and / or a bandwidth used by the receiving channel.

[0012] In a possible implementation manner of the first aspect, the second mapping strategy is received from a baseband unit, or the second mapping strategy is locally configured.

[0013] In a possible implementation of the first aspect, when a bandwidth used by a transmission channel is smaller than an available bandwidth of the transmission channel or smaller than a specific frequency range, the bandwidth used by the transmission channel is frequency-switched at different times.

[0014] In a possible implementation of the first aspect, when a bandwidth used by a receiving channel is smaller than an available bandwidth of the receiving channel or smaller than a specific frequency range, the bandwidth used by the receiving channel is frequency-switched at different times.

[0015] By switching frequencies at different times through the bandwidth used by the channel, the channel can traverse a larger bandwidth range, so that the limited channel bandwidth can indicate a channel with a larger bandwidth.

[0016] In a possible implementation manner of the first aspect, a signal of at least one transmitting channel among the M transmitting channels is output to the antenna unit through multiple transmitting branches, and a phase shift control unit is provided on the transmitting branch.

[0017] In a possible implementation manner of the first aspect, at least one receiving channel among the N receiving channels receives a signal from the antenna unit through multiple receiving branches, and a phase shift control unit is provided on the receiving branch.

[0018] In a possible implementation of the first aspect, the M transmit channels drive all or part of the antenna array. Optionally, the M transmit channels drive the antenna array via a switch or a duplexer.

[0019] In a possible implementation of the first aspect, the N receiving channels drive all or part of the antenna array. Optionally, the N receiving channels drive the antenna array through a switch or a duplexer.

[0020] In a possible implementation manner of the first aspect, the transmit channel is a transmit intermediate frequency channel.

[0021] In a possible implementation manner of the first aspect, the receiving channel is a receiving intermediate frequency channel.

[0022] By reducing the number of intermediate frequency channels or the bandwidth used by the intermediate frequency channels, the total amount of signals processed in the intermediate frequency domain is reduced, the system's resource overhead is reduced, and power consumption is reduced. In a possible implementation of the first aspect, mapping the first signal to M transmission channels includes: mapping the first signal to P sub-carrier channels, mapping the signals output by the P sub-carrier channels to M transmission channels, where the bandwidth of the sub-carrier channels is one carrier bandwidth, and P is an integer greater than or equal to 1. Optionally, P satisfies the following formula: P*carrier bandwidth=M*bandwidth used by the transmission channel, or P*carrier bandwidth<M*bandwidth used by the transmission channel.

[0023] When the total bandwidth of the subcarrier channels equals the total bandwidth used by the transmit channels, the transmit channels aggregate multicarrier signals. When the total bandwidth of the subcarrier channels is less than the total bandwidth used by the transmit channels, the subcarrier channels need to process fewer signals than the transmit channels, resulting in a smaller number of signals that the baseband unit needs to output, reducing system resource overhead and lowering power consumption.

[0024] In a possible implementation of the first aspect, aggregating signals output by N receiving channels into a baseband signal includes: mapping the signals output by the N receiving channels to Q sub-carrier channels, and aggregating the signals output by the Q sub-carrier channels into the baseband signal, where a bandwidth of the sub-carrier channel is one carrier bandwidth, and Q is an integer greater than or equal to 1. Optionally, Q satisfies the following formula: Q*carrier bandwidth=N*bandwidth used by the receiving channel, or Q*carrier bandwidth<N*bandwidth used by the receiving channel.

[0025] When the total bandwidth of the subcarrier channels is equal to the total bandwidth used by the receiving channels, the multicarrier signals aggregated in the receiving channels can be divided into single carrier signals in the subcarrier channels. When the total bandwidth of the subcarrier channels is less than the total bandwidth used by the receiving channels, it is possible to flexibly select signals output by some of the receiving channels to be input into the subcarrier channels, or flexibly select signals of some frequency bands within the signals output by the receiving channels to be input into the subcarrier channels, or flexibly select signals of some frequency bands within the signals output by some of the receiving channels to be input into the subcarrier channels. This results in the subcarrier channels needing to process fewer signals than the receiving channels, and the corresponding amount of signals input to the baseband unit is reduced, thereby reducing system resource overhead and lowering power consumption.

[0026] A second aspect of an embodiment of the present application provides a signal processing device, including:

[0027] a receiving unit, configured to receive a first signal from a baseband unit; a processing unit, configured to map the first signal to M transmission channels, where M is less than or equal to the number of available transmission channels and / or the bandwidth used by the transmission channels is less than or equal to the available bandwidth of the transmission channels, and M is an integer greater than or equal to 1; and / or,

[0028] A receiving unit is configured to receive a second signal from the radio frequency unit and input the signal into a receiving channel; a processing unit is configured to aggregate the signals output by N receiving channels into a baseband signal, where N is less than or equal to the number of available receiving channels and / or the bandwidth used by the receiving channel is less than or equal to the bandwidth available for the receiving channel, and N is an integer greater than or equal to 1.

[0029] In a possible implementation of the second aspect, a sum of bandwidths used by the M transmit channels is equal to a sum of bandwidths used by the N receive channels.

[0030] In a possible implementation manner of the second aspect, the processing unit is further configured to: map the first signal to M transmission channels according to a first mapping strategy.

[0031] In a possible implementation manner of the second aspect, the first mapping strategy includes M and / or a bandwidth used by a transmission channel.

[0032] In a possible implementation manner of the second aspect, the receiving unit is further configured to: receive the first mapping strategy from the baseband unit.

[0033] In a possible implementation manner of the second aspect, the processing unit is further configured to: aggregate signals output by the N receiving channels into a baseband signal according to a second mapping strategy.

[0034] In a possible implementation manner of the second aspect, the second mapping strategy includes N and / or a bandwidth used by the receiving channel.

[0035] In a possible implementation manner of the second aspect, the receiving unit is further configured to: receive a second mapping strategy from the baseband unit.

[0036] In a possible implementation manner of the second aspect, the processing unit is further configured to: when the bandwidth used by the transmission channel is smaller than the available bandwidth of the transmission channel or smaller than a specific frequency range, perform frequency switching on the bandwidth used by the transmission channel at different times.

[0037] In a possible implementation manner of the second aspect, the processing unit is further configured to: when the bandwidth used by the receiving channel is smaller than the available bandwidth of the receiving channel or smaller than a specific frequency range, perform frequency switching on the bandwidth used by the receiving channel at different times.

[0038] In a possible implementation manner of the second aspect, the processing unit is further configured to: output a signal of at least one of the M transmitting channels to the antenna unit through multiple transmitting branches, and a phase shift control unit is provided on the transmitting branch.

[0039] In a possible implementation manner of the second aspect, the processing unit is further configured to: at least one receiving channel among the N receiving channels receives a signal from the antenna unit through multiple receiving branches, and a phase shift control unit is provided on the receiving branch.

[0040] In a possible implementation of the second aspect, the processing unit is further configured to: the M transmit channels drive all or part of the antenna array. Optionally, the M transmit channels drive the antenna array through a switch or a duplexer.

[0041] In a possible implementation of the second aspect, the processing unit is further configured to: enable the N receiving channels to drive all or part of the antenna array. Optionally, the N receiving channels drive the antenna array via a switch or a duplexer.

[0042] In a possible implementation manner of the second aspect, the transmit channel is a transmit intermediate frequency channel.

[0043] In a possible implementation manner of the second aspect, the receiving channel is a receiving intermediate frequency channel.

[0044] In a possible implementation of the second aspect, the processing unit is further used to: map the first signal to P sub-carrier channels, and map the signals output by the P sub-carrier channels to M transmission channels, where the bandwidth of the sub-carrier channels is one carrier bandwidth, P is an integer greater than or equal to 1, and P satisfies the following formula: P*carrier bandwidth=M*bandwidth used by the transmission channel.

[0045] In a possible implementation of the second aspect, the processing unit is further used to: map the signals output by the N receiving channels to Q sub-carrier channels, and aggregate the signals output by the Q sub-carrier channels into a baseband signal, where the bandwidth of the sub-carrier channel is one carrier bandwidth, Q is an integer greater than or equal to 1, and Q satisfies the following formula: Q*carrier bandwidth=N*bandwidth used by the receiving channel.

[0046] A third aspect of an embodiment of the present application provides a signal processing device, comprising: one or more processors and a memory, wherein the memory stores computer-executable instructions that can be run on the processor, and when the computer-executable instructions are executed by the processor, the communication device executes the method described in the first aspect or any one of the implementation methods of the first aspect.

[0047] A fourth aspect of an embodiment of the present application provides a chip or a chip system, which includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through lines, and the at least one processor is used to run computer programs or instructions to execute the method described in the first aspect or any one of the implementation methods of the first aspect.

[0048] A fifth aspect of an embodiment of the present application provides a base station, comprising: a baseband unit, an antenna unit, and a signal processing device as described in the second or third aspect above, or a chip or chip system as described in the fourth aspect.

[0049] Among them, the technical effects of the second to fifth aspects can refer to the beneficial effects of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic diagram of a signal processing device according to an embodiment of the present application;

[0051] Figure 2 This is a schematic diagram of another signal processing device according to an embodiment of the present application;

[0052] Figure 3 This is a schematic diagram of the inter-frequency round-robin training in an embodiment of the present application;

[0053] Figure 4 This is a schematic diagram of the same-frequency round-robin training in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The terms "first", "second", "third" and "fourth" in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects rather than to limit a specific order.

[0055] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0056] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, a and b, a and c, b and c or a, b and c, where a, b and c can be single or multiple.

[0057] The signal processing method provided in the embodiment of the present application can be applied to various mobile communication systems, such as: long term evolution (LTE) system, advanced long term evolution (LTE-A) system, universal mobile telecommunication system (UMTS), evolved long term evolution (eLTE) system, 5G (such as new radio (NR) system), and future communication systems.

[0058] The signal processing method provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings. The signal processing method provided by the embodiment of the present application can be applied to a signal processing device, which can be deployed in or integrated into a base station or a terminal.

[0059] A base station is a device deployed in a radio access network to provide wireless communication capabilities for terminal devices. The name of the device that performs base station functions may vary in systems using different radio access technologies. For example, in LTE networks, it is called an evolved NodeB (eNB or eNodeB), in third-generation (3G) networks, it is called a NodeB, and in fifth-generation communication systems, it is used in many other ways.

[0060] Terminals include, but are not limited to, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices (such as smart watches, smart bracelets, pedometers, etc.), vehicle-mounted devices (such as cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed trains, etc.), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, smart home devices (such as refrigerators, televisions, air conditioners, electricity meters, etc.), intelligent robots, workshop equipment, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, flying equipment (such as intelligent robots, hot air balloons, drones, airplanes), etc.

[0061] Figure 1 A schematic diagram of a signal processing device provided in an embodiment of the present application. Figure 1 The logic units included in the signal processing device are shown to facilitate the introduction of the signal processing method proposed in this application. Figure 1 The signal processing device shown includes at least an intermediate frequency unit. Optionally, the signal processing device may further include a radio frequency unit. The intermediate frequency unit and the radio frequency unit may be connected to the baseband unit and the antenna unit; or, the baseband unit and / or the antenna unit and the intermediate frequency unit and the radio frequency unit are all included in the signal processing device. It can be understood that the logic units included in the signal processing device are functional divisions. In actual implementation, there may be other division methods, such as the functions of multiple units may be combined or integrated into another device; each logic unit may or may not be physically separated, and each logic unit may be one physical unit or multiple physical units, that is, it may be deployed in one device or in multiple distributed devices. This application does not limit this.

[0062] The baseband unit has a baseband processing function and can also be used to send a control signal to the intermediate radio frequency unit to enable the intermediate radio frequency unit to perform a corresponding operation. The control signal can include, for example, the mapping strategy described below.

[0063] The RF unit may include one or more transmit (Tx) RF channels and one or more receive (Rx) RF channels. The Tx RF channel may include a power amplifier (PA). The Tx RF channel may also include a transmit filter (Tx filter). The Rx RF channel may include a low noise amplifier (LNA). The Rx RF channel may also include a receive filter (Rx filter). The RF unit may also include a digital-to-analog converter (DAC) corresponding to the Tx RF channel, and the signal is input into the Tx RF channel after being converted by the DAC; the RF unit may also include an analog-to-digital converter (ADC) corresponding to the Rx RF channel, and the signal is input into the ADC after passing through the Rx RF channel.

[0064] The intermediate frequency unit is used to process the baseband signal and output it to multiple RF transmission channels, and is also used to convert signals from multiple RF receiving channels into baseband signals. The intermediate frequency unit may include a Tx intermediate frequency channel and an Rx intermediate frequency channel corresponding one-to-one to the Tx RF channel and the Rx RF channel. The Tx intermediate frequency channel and the Rx intermediate frequency channel may include functional modules such as a filtering module and a rate conversion module, which are used to perform filtering, rate conversion and other processing on the signals input to the intermediate frequency channel. The baseband signal can be mapped into multiple signals through a mapping network and input into each Tx intermediate frequency channel. The signals output by multiple Rx intermediate frequency channels can be converged into baseband signals through a convergence network and input into the baseband unit. Among them, the mapping network and the convergence network can be specifically implemented by means of matrix operations.

[0065] The above-mentioned intermediate frequency unit and radio frequency unit can also be collectively referred to as an intermediate radio frequency unit. It can be understood that the intermediate radio frequency unit is used to power amplify or filter the baseband signal to convert the baseband signal into a radio frequency signal, and convert the radio frequency signal into a baseband signal.

[0066] The antenna unit can be used to receive or send radio frequency signals, that is, to achieve energy conversion between radio frequency signals and electromagnetic waves.

[0067] like Figure 1 There are multiple implementations for the downlink transmitting side and uplink receiving side of the signal processing device shown in FIG. 6 . The possible signal processing processes of the downlink transmitting side and uplink receiving side of the signal processing device are respectively described in detail below.

[0068] Regarding the downlink transmission side of the signal processing device:

[0069] A first signal is received from a baseband unit, which is referred to as a baseband signal in the following text; and the first signal is mapped to a Tx intermediate frequency channel. The following describes in detail the process of mapping the first signal to the Tx intermediate frequency channel.

[0070] In this signal processing device, the number of available Tx IF channels is G, and the available bandwidth of the Tx IF channels is BW. G . Available can be understood as the maximum available or allowed to be used that is supported or configured by the hardware. During the signal processing process, the number of Tx IF channels actually used may be less than or equal to the number of available Tx IF channels, and the channel bandwidth actually used by each Tx IF channel may be less than or equal to the available bandwidth of the Tx IF channel. The bandwidth actually used by the Tx IF channel (or simply referred to as the bandwidth used by the Tx IF channel) can be understood as the sum of the carrier bandwidths used when the Tx IF channel performs digital IF domain processing (such as rate conversion, filtering, etc.). Exemplarily, a Tx IF channel can use 4 carriers, and the carrier bandwidth of each carrier is BW, then the bandwidth used by a Tx IF channel is 4*BW.

[0071] In the first possible implementation, the number of channels used by the Tx IF channel is G. The bandwidth used by the G Tx IF channels is BW G That is, the mapping network maps the baseband signal into G channels and outputs it to the G Tx IF channels.

[0072] In the second possible implementation, the number of available Tx IF channels remains G, but only M of them are used, with M being smaller than G. In other words, the mapping network maps the baseband signal to only M channels and outputs them to M Tx IF channels. Because the baseband signal only needs to be mapped to M of the G Tx IF channels, the mapping network is smaller in size and processes less data, conserving computing resources and reducing system resource overhead.

[0073] In the third possible implementation, the number of channels available for the Tx IF channel remains G, and the bandwidth available for the Tx IF channel remains BW. G , but only uses part of the bandwidth BW G ', where BW G 'less than BW G That is, after the mapping network maps the baseband signal into G channels, the actual bandwidth used by the Tx IF channel for digital IF domain processing of each signal is BW G '.

[0074] In a fourth possible implementation, the second possible implementation and the third possible implementation can be combined, that is, the number of channels available for the Tx intermediate frequency channel is still G, and the bandwidth available for the Tx intermediate frequency channel is still BW.G , but only M of them are used, and the M Tx IF channels only use part of the bandwidth BW G '. Where M is less than G, and BW G 'less than BW G That is, the mapping network maps the baseband signal into M channels only and outputs it to M Tx IF channels. The actual bandwidth used by the M Tx IF channels for digital IF domain processing is BW G '.

[0075] For example, when the number of downlink service multiplexing flows is not high, the second possible implementation method mentioned above may be selected; when the number of downlink service multiplexing flows is high, the third possible implementation method mentioned above may be selected.

[0076] When the total downlink service demand is large but is not sensitive to the number of multiplexed streams, that is, the gain of the receiving antenna, the second possible implementation method mentioned above can be selected, that is, only reducing the number of channels used without reducing the bandwidth used by the channels; when the total uplink service demand is not large but is very sensitive to the gain of the receiving antenna, such as in scenarios with limited user coverage, the third possible implementation method mentioned above can be selected, that is, reducing the bandwidth used by the channels without reducing the number of channels.

[0077] The Tx IF channel corresponds to the DAC and Tx RF channel one by one. Optionally, a splitter can be provided between the Tx RF channel and the antenna unit, and a phase shifter can be provided on each branch between the splitter and the antenna unit. The splitter is used to split the signal output by the Tx RF channel and perform phase shifting on the split signal. This allows the Tx RF channel to drive more antenna arrays to obtain better antenna side face benefits; it also allows the number of signal paths output by the Tx RF channel to the antenna unit to be more than the number of Tx IF channels, so as to avoid adverse effects on the antenna side face benefits when the number of IF channels is reduced.

[0078] Optionally, the Tx RF channel may drive all or part of the antenna array in the antenna unit. Specifically, the Tx RF channel may control driving all or part of the antenna array in the antenna unit through a switch or a duplexer.

[0079] Regarding the uplink receiving side of the signal processing device:

[0080] A second signal (hereinafter referred to as the RF signal) is received from the RF unit; the second signal is input into the Rx IF channel, and the signals output from some or all of the Rx IF channels are aggregated and input into the baseband unit. The signals output from the Rx IF channels are aggregated and input into the baseband unit, hereinafter referred to as the baseband signal. The following describes in detail the process of aggregating the Rx IF channel signals into the baseband signal.

[0081] In the signal processing device, the number of available Rx IF channels is H, and the available bandwidth of the Rx IF channels is BW. H . Available can be understood as the maximum available or allowed to be used that is supported or configured by the hardware. During the signal processing process, the number of Rx IF channels actually used may be less than or equal to the number of available Rx IF channels, and the channel bandwidth actually used by each Rx IF channel may be less than or equal to the available bandwidth of the Rx IF channel. The bandwidth actually used by the Rx IF channel (or simply referred to as the bandwidth used by the Rx IF channel) can be understood as the sum of the carrier bandwidths used when the Rx IF channel performs digital IF domain processing (such as rate conversion, filtering, etc.). Exemplarily, an Rx IF channel can use 4 carriers, and the carrier bandwidth of each carrier is BW, then the bandwidth used by a Tx IF channel is 4*BW.

[0082] In a first possible implementation, the number of channels used by the Rx intermediate frequency channels is H. The bandwidth used by the H Rx intermediate frequency channels is BW H .

[0083] In the second possible implementation, the number of available Rx IF channels is still H, but only N of them are aggregated into baseband signals by the aggregation network, where N is less than H. The bandwidth used by the N Rx IF channels can be BW H Specifically, only N of the H Rx IF channel output signals are input into the aggregation network; or, after more than N Rx IF channel output signals are input into the aggregation network, the aggregation network selects only N of them to aggregate into baseband signals. Because the aggregation network only needs to aggregate N signals into baseband signals, the aggregation network is smaller in scale and processes less data, saving computing resources and reducing system resource overhead.

[0084] In the third possible implementation, the number of channels available for the Rx IF channel remains H, and the bandwidth available for the Rx IF channel remains BW. H , but only uses part of the bandwidth BW H ', where BW H 'less than BW H That is, the signal output by each ADC is input to each Rx IF channel, and the actual bandwidth used by the Rx IF channel for digital IF domain processing of each signal is BW H '.

[0085] In a fourth possible implementation, the second possible implementation and the third possible implementation can be combined, that is, the number of channels available for the Rx intermediate frequency channel is still H, and the bandwidth available for the Rx intermediate frequency channel is still BW. H, but only N of the signals are aggregated into baseband signals by the aggregation network, and the N Rx intermediate frequency channels only use part of the bandwidth BW H ', N is less than H, and BW H 'less than BW H Specifically, the H Rx IF channels all use part of the bandwidth BW H ', and only N of the signals output by the H Rx IF channels are input to the aggregation network and aggregated into baseband signals; or, all H Rx IF channels use part of the bandwidth BW H ', and the signals output by the H-way Rx intermediate frequency channels are input to the aggregation network, and the aggregation network only selects N-way signals to be aggregated into baseband signals; or, only N-way Rx intermediate frequency channels among the H-way Rx intermediate frequency channels use part of the bandwidth BW H ', and the signals output by the N-way Rx intermediate frequency channels are input to the aggregation network and aggregated into baseband signals. The above H-way Rx intermediate frequency channels all use part of the bandwidth BW H The "H roads" in ' can be replaced by "more than N roads", and the "H roads" in the subsequent processing process can also be replaced by "more than N roads" accordingly.

[0086] For example, when the total uplink service demand is large but is not sensitive to the number of multiplexed streams, that is, the gain of the receiving antenna, the second possible implementation method mentioned above can be selected, that is, only reducing the number of channels used without reducing the bandwidth used by the channels; when the total uplink service demand is not large, but is very sensitive to the gain of the receiving antenna, such as in a scenario with limited user coverage, the third possible implementation method mentioned above can be selected, that is, reducing the bandwidth used by the channels without reducing the number of channels.

[0087] The Rx IF channel corresponds one-to-one to the ADC and the Rx RF channel. Optionally, a combiner may be provided between the Rx RF channel and the antenna unit, and a phase shifter may be provided on each branch between the combiner and the antenna unit. The phase shifter is used to phase-shift the signal from the antenna unit, and the combiner is used to combine the phase-shifted multi-path signals. This allows the Rx RF channel to drive more antenna arrays to obtain better antenna side-face benefits; it also allows the Rx RF channel to receive more signal paths from antenna units than the Rx IF channel, so as to avoid adverse effects on the antenna side-face benefits when the number of IF channels is reduced. The reduction in the number of IF channels can be understood as the fact that in the above implementation, only part of the signals output by the Rx IF channels are aggregated into baseband signals by the aggregation network.

[0088] Optionally, the Rx RF channel may drive all or part of the antenna array in the antenna unit. Specifically, the Rx RF channel may control driving all or part of the antenna array in the antenna unit through a switch or a duplexer.

[0089] It can be understood that any of the four possible implementations of the downlink transmitting side can be used in combination with any of the four possible implementations of the uplink receiving side, and this application does not limit this.

[0090] Optionally, the sum of the bandwidths actually used by all intermediate frequency channels on the downlink transmitting side is the same as the sum of the bandwidths actually used by the intermediate frequency channels on the uplink receiving side. For example, when the downlink transmitting side adopts the first implementation method and the uplink receiving side adopts the fourth implementation method, the following relationship may exist: G*BW G =N*BW N .

[0091] Optionally, the signal processing device determines or changes the implementation mode of the downlink transmission side and / or the implementation mode of the uplink reception side in each time slot. The time interval for determining or changing the above-mentioned uplink / downlink implementation mode can be one time slot, one frame, or other time length, which is not limited in this application.

[0092] Optionally, when the intermediate frequency channel uses only part of the available bandwidth, frequency hopping configuration (i.e., frequency hopping rotation) can be performed, that is, the intermediate frequency channel on the downlink transmitting side or the uplink receiving side can use different parts of the available bandwidth at different times, or the intermediate frequency channel can use different parts within a specific bandwidth range at different times, and the specific bandwidth range is smaller than the available bandwidth. The time interval for the change in the bandwidth of the intermediate frequency channel can be the same as the time interval for determining or changing the above-mentioned uplink / downlink implementation method, or can be smaller than the time interval for determining or changing the above-mentioned uplink / downlink implementation method. The frequency hopping configuration can realize the traversal of the full frequency band of the available bandwidth or the traversal of a specific bandwidth range of the Rx intermediate frequency channel or the Tx intermediate frequency channel, and can also indicate the full frequency band channel of the available bandwidth or the channel of a specific bandwidth range through the limited bandwidth of each channel. Thereby, the mutual difference requirements of the uplink and downlink channels can also be met.

[0093] Frequency hopping configuration includes different frequency rotation and same frequency rotation.

[0094] like Figure 3As shown, the inter-frequency rotation training is that the bandwidths used by each intermediate frequency channel on the downlink transmitting side or the uplink receiving side are different at the same time, and the bandwidths used by each intermediate frequency channel are switched at the next switching moment. Inter-frequency rotation training can be, for example: at moment #1, Rx intermediate frequency channel 1 uses the 0-25MHz frequency band as the used bandwidth, Rx intermediate frequency channel 2 uses the 25-50MHz frequency band as the used bandwidth, Rx intermediate frequency channel 3 uses the 50-75MHz frequency band as the used bandwidth, and Rx intermediate frequency channel 4 uses the 75-100MHz frequency band as the used bandwidth; at moment #2, Rx intermediate frequency channel 1 uses the 25-50MHz frequency band as the used bandwidth, Rx intermediate frequency channel 2 uses the 50-75MHz frequency band as the used bandwidth, Rx intermediate frequency channel 3 uses the 75-100MHz frequency band as the used bandwidth, and Rx intermediate frequency channel 4 uses the 0-25MHz frequency band as Bandwidth usage: At time #3, Rx IF channel 1 uses the 50-75 MHz band, Rx IF channel 2 uses the 75-100 MHz band, Rx IF channel 3 uses the 0-25 MHz band, and Rx IF channel 4 uses the 25-50 MHz band. At time #4, Rx IF channel 1 uses the 75-100 MHz band, Rx IF channel 2 uses the 0-25 MHz band, Rx IF channel 3 uses the 25-50 MHz band, and Rx IF channel 4 uses the 50-75 MHz band. After these four switching operations, all four Rx IF channels have traversed the 100 MHz band.

[0095] like Figure 4 As shown, the same-frequency rotation training means that the bandwidth used by each intermediate frequency channel on the downlink transmitting side or the uplink receiving side is the same at the same time, and the bandwidth used by each intermediate frequency channel switches at the next switching moment. For example, the same-frequency rotation training can be: at moment #1, the four Rx intermediate frequency channels all use the 0-25MHz frequency band as the used bandwidth; at moment #2, the four Rx intermediate frequency channels all use the 25-50MHz frequency band as the used bandwidth; at moment #3, the four Rx intermediate frequency channels all use the 50-75MHz frequency band as the used bandwidth; at moment #4, the four Rx intermediate frequency channels all use the 75-100MHz frequency band as the used bandwidth. After the above four switches, the four Rx intermediate frequency channels have traversed the 100MHz frequency band.

[0096] Optionally, the signal processing device may perform the above-mentioned intermediate frequency domain signal processing according to a mapping strategy. The mapping strategy is used to indicate or describe the usage strategy of the intermediate frequency channels on the downlink transmitting side and the uplink receiving side during the signal processing process. The mapping strategy can be configured locally or received from the baseband unit. The baseband unit determines the mapping strategy based on information such as signal quality and data volume.

[0097] In a possible implementation, the mapping strategy is used to indicate the implementation of the downlink transmitting side and / or the implementation of the uplink receiving side. Optionally, the mapping strategy includes uplink mapping strategy indication information and downlink mapping strategy indication information. Exemplarily, the mapping strategy is used to indicate that the uplink receiving side adopts the first implementation method mentioned above, and the downlink transmitting side adopts the fourth implementation method mentioned above; according to the mapping strategy and H, BW H ,M,BW G The value of H, BW is used to perform the above-mentioned signal processing in the intermediate frequency domain. H ,M,BW G The value can be configured locally, or a default value can be agreed upon.

[0098] In one possible implementation, the mapping strategy is used to indicate one or more of the following information: the number of Tx IF channels actually used, the channel bandwidth actually used by the Tx IF channels, the number of Rx IF channels actually used, and the channel bandwidth actually used by the Rx IF channels. Exemplarily, the mapping strategy includes one or more of the above information.

[0099] It is understood that when the mapping network is implemented through matrix operations, the matrix size can be flexibly adjusted, thereby flexibly varying the number of output signal paths. The matrix size of the mapping network can be determined based on the mapping strategy described above. When the aggregation network is implemented through matrix operations, the matrix size can also be flexibly adjusted, thereby flexibly adjusting the matrix size based on the number of input signal paths.

[0100] above Figure 1 The signal processing process of the signal processing device shown in FIG. Figure 2 This can be achieved in the manner shown.

[0101] Regarding the downlink transmission side of the signal processing device:

[0102] The intermediate frequency unit of the signal processing device may also include a multi-channel carrier processing channel arranged between the mapping network and the Tx intermediate frequency channel. The carrier processing channel is used to perform carrier processing on the signal, such as performing rate conversion, filtering and other processing on the signal at a single carrier granularity. The carrier processing channel can achieve finer-grained signal processing compared to the above-mentioned intermediate frequency channel. In the embodiment of the present application, the bandwidth BW of each channel in the carrier processing channel is C It can be set to a carrier bandwidth, which corresponds to the bandwidth of a carrier in the above Tx intermediate frequency channel, that is, the above BW. The bandwidth of each channel in the carrier processing channel BW CIt can also be set to other values, and this application does not limit it. The bandwidth of the sub-carrier processing channel can be set when deploying the signal processing device, or can be set or changed by other means at other times, and this application does not limit it. It can be understood that the bandwidth is fixed before the next setting or change of the bandwidth of the sub-carrier processing channel.

[0103] The number of sub-carrier processing channels can meet the following conditions: the number of channels of the sub-carrier processing channel * BW CT ≤ the number of available channels of the Tx intermediate frequency channel * the available bandwidth of the Tx intermediate frequency channel.

[0104] In a possible implementation, the number of channels of the sub-carrier processing channel * BW CT < the number of used channels of the Tx intermediate frequency channel * the used bandwidth of the Tx intermediate frequency channel, that is, the total bandwidth of the sub-carrier processing channel < the total bandwidth used by the Tx intermediate frequency channel. Optionally, the number of sub-carrier processing channels can be set when deploying the signal processing device, or can be set or changed by other means at other times, or can be set or changed periodically. Hereinafter, the number of channels of the sub-carrier processing channel in this implementation will be simply referred to as M'.

[0105] That is to say, the mapping network #10 maps the baseband signal into M' paths of signals and inputs them into M' paths of sub-carrier processing channels, and then the mapping network #11 maps the M' paths of signals into multiple paths of signals and inputs them into the Tx intermediate frequency channel.

[0106] Since the total bandwidth of the sub-carrier processing channel < the total bandwidth used by the Tx intermediate frequency channel, the mapping network #11 needs to map the M' paths of signals into more than M' paths of signals, so that due to the increase in the number of mapped signals, the total mapped bandwidth increases and can match the total bandwidth used by the Tx intermediate frequency channel. And the amount of signals that the sub-carrier channel needs to process is less than the amount of signals processed by the Tx intermediate frequency channel, and correspondingly, the amount of signals that the baseband unit needs to output is reduced, reducing the resource overhead of the system and lowering the power consumption.

[0107] In a possible implementation, the number of sub-carrier processing channels * BW = the number of used channels of the Tx intermediate frequency channel * the used bandwidth of the Tx intermediate frequency channel, that is, the total bandwidth of the sub-carrier processing channel = the total bandwidth used by the Tx intermediate frequency channel. Which几路 channels are used in the multiple sub-carrier processing channels can depend on the mapping strategy of the intermediate frequency channel. When the total bandwidth of the sub-carrier channel is equal to the total bandwidth used by the Tx intermediate frequency channel, the aggregation of multi-carrier signals by the Tx intermediate frequency channel is achieved. The following will introduce this in detail.

[0108] Specifically, in the above Figure 1 in the first possible implementation, the mapping strategy of the intermediate frequency channel is to use G paths of Tx intermediate frequency channels, and the bandwidth used by these G paths of Tx intermediate frequency channels is BWG Mapping network #10 can map the baseband signal into G' channels, which pass through the carrier processing channels. Then mapping network #11 maps the output signal of the G' carrier processing channels into G channels and inputs them into the Tx intermediate frequency channel. G' satisfies the following formula: G'*BW=G*BW G .

[0109] Specifically, the above Figure 1 In the second possible implementation, the IF channel mapping strategy is to use only M of the G Tx IF channels, and the bandwidth used by the M IF channels is BW G Mapping network #10 can map the baseband signal into M' channels, which are then passed through the carrier processing channels. Mapping network #11 then maps the output signals of the M' channels into M channels and inputs them into the Tx IF channel. M' satisfies the following formula: M'*BW=M*BW G .

[0110] Specifically, the above Figure 1 In the third possible implementation, the IF channel mapping strategy is to use G Tx IF channels, and the bandwidth used by the G IF channels is BW G '. Mapping network #10 can map the baseband signal into G' channels. The G' channels pass through the carrier processing channels respectively. Then mapping network #11 maps the output signals of the G' channels into G channels and inputs them into the Tx intermediate frequency channel. G' satisfies the following formula: G'*BW=G*BW G '.

[0111] Specifically, the above Figure 1 In the fourth possible implementation, the IF channel mapping strategy is to use M channels among the G Tx IF channels, and the bandwidth used by the M IF channels is BW G '. Mapping network #10 can map the baseband signal into M' channels, which are then passed through the sub-carrier processing channels. Then mapping network #11 maps the output signals of the M' sub-carrier processing channels into M channels and inputs them into the Tx intermediate frequency channel. M' satisfies the following formula: M'*BW=M*BW G '.

[0112] Regarding the uplink receiving side of the signal processing device:

[0113] The IF unit of the signal processing device may further include a multi-channel carrier processing channel provided between the mapping network and the Rx IF channel. The functions of the carrier processing channel are similar to those of the downlink transmitting side, and are not described here in detail.

[0114] The number of sub-carrier processing channels can meet the following condition: the number of channels of the sub-carrier processing channels * BW CR ≤ the number of available channels of the Rx intermediate frequency channels * the available bandwidth of the Rx intermediate frequency channels.

[0115] In a possible implementation, the number of channels of the sub-carrier processing channels * BW CR < the number of used channels of the Rx intermediate frequency channels * the used bandwidth of the Rx intermediate frequency channels, that is, the total bandwidth of the sub-carrier processing channels < the total bandwidth used by the Rx intermediate frequency channels. Optionally, the number of sub-carrier processing channels can be set when deploying the signal processing device, or can be set or changed by other means at other times, or can be set or changed periodically. Hereinafter, the number of channels of the sub-carrier processing channels in this implementation will be simply referred to as N'.

[0116] It can be understood that in this implementation, the mapping network #20 needs to compress the signals output by the Rx intermediate frequency channels so that the total bandwidth of the mapped signals matches the total bandwidth of the sub-carrier channels. The mapping network #20 can only select the signals output by some Rx intermediate frequency channels for mapping, or can select the signals of some frequency bands in the signals output by the Rx intermediate frequency channels for mapping, or can select the signals of some frequency bands in the signals output by some Rx intermediate frequency channels for mapping. So that the amount of signals to be processed by the sub-carrier channels is less than the amount of signals processed by the receiving channels, and correspondingly, the amount of signals input to the baseband unit is reduced, reducing the resource overhead of the system and lowering the power consumption. That is to say, for the signals output by the Rx intermediate frequency channels, the mapping network #20 can reduce the total signal bandwidth by reducing the number of signal channels and / or reducing the bandwidth of each signal path to match the total bandwidth of the sub-carrier channels. Exemplarily, when the Rx intermediate frequency channels use 16 channels and the bandwidth used by each channel is 4 * BW, and the number of channels of the sub-carrier processing channels is 8, and the bandwidth of the sub-carrier processing channels is BW CR is BW, the mapping network #20 can only select the signals output by 2 Rx intermediate frequency channels for mapping, or can select the signals output by 8 Rx intermediate frequency channels and intercept the signals with a bandwidth of BW for mapping, or can select the signals output by 4 Rx intermediate frequency channels and intercept the signals with a bandwidth of 2 * BW for mapping.

[0117] In a possible implementation, the number of sub-carrier processing channels * BW = the number of used channels of the TX intermediate frequency channels * the used bandwidth of the TX intermediate frequency channels, that is, the total bandwidth of the sub-carrier processing channels is equal to the total bandwidth used by the Rx intermediate frequency channels. Which channels are used in the multiple sub-carrier processing channels can depend on the mapping strategy of the intermediate frequency channels. When the total bandwidth of the sub-carrier channels is equal to the total bandwidth used by the Rx receiving channels, the multi-carrier signals aggregated in the Rx intermediate frequency channels can be divided into single-carrier signals in the sub-carrier channels. The following will introduce this in detail.

[0118] Specifically, in the first possible implementation, the IF channel mapping strategy is to use H Rx IF channels, and the bandwidth used by the H Rx IF channels is BW H The mapping network #20 can map the output signals of H Rx intermediate frequency channels into H' channels. The H' channels are respectively processed through the carrier processing channels. Then, the convergence network converges the output signals of the H' channels into baseband signals. H' satisfies the following formula: H'*BW=H*BW H .

[0119] Specifically, in the second possible implementation, the IF channel mapping strategy is to use only N of the H Rx IF channels, and the bandwidth used by the N IF channels is BW H The mapping network #20 can map the signals output by N Rx intermediate frequency channels into N' channels. These N' channels are respectively processed by the carrier processing channels. Then, the convergence network converges the signals output by the N' channels into baseband signals. N' satisfies the following formula: N'*BW=N*BW G .

[0120] Specifically, in the third possible implementation, the IF channel mapping strategy is to use H Rx IF channels, and the bandwidth used by the H IF channels is BW H '. Then the mapping network #20 can map the signals output by H Rx intermediate frequency channels into H' channels. The H' channels are respectively processed by the sub-carrier processing channels. Then the aggregation network aggregates the signals output by the H' sub-carrier processing channels into baseband signals. H' satisfies the following formula: H'*BW=H*BW G '.

[0121] Specifically, in the fourth possible implementation, the IF channel mapping strategy is to use N of the H Rx IF channels, and the bandwidth used by the N IF channels is BW H '. The mapping network #20 can map the signals output by N Rx intermediate frequency channels into M' channels. The M' channels are respectively passed through the sub-carrier processing channels. Then, the aggregation network aggregates the signals output by the N' sub-carrier processing channels into baseband signals. N' satisfies the following formula: N'*BW=N*BW G '.

[0122] The division of the modules or units of the above-mentioned signal processing device is only a logical function division. There may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0123] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0124] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0125] Exemplarily, the signal processing device may include a receiving unit and a processing unit, wherein the receiving unit is configured to execute the above Figure 1 or Figure 2 The receiving action of the signal processing device shown in FIG. 1 is used to execute the above Figure 1 or Figure 2 The signal processing device shown performs processing operations such as mapping.

[0126] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0127] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0128] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

Claims

1. A signal processing method, characterized in that: receiving a first signal from a baseband unit, mapping the first signal to M transmit channels, where M is less than the number of available transmit channels and / or the bandwidth used by the transmit channels is less than the available bandwidth of the transmit channels, and M is an integer greater than or equal to 1; The mapping of the first signal to M transmit channels includes: mapping the first signal to P sub-carrier channels, and mapping the signals output from the P sub-carrier channels to the M transmit channels, the bandwidth of the sub-carrier channels being one carrier bandwidth, and P being an integer greater than or equal to 1.

2. The method according to claim 1, characterized in that The method further includes: receiving a second signal from a radio frequency unit and inputting it into a receive channel, and aggregating the signals output from N of the receive channels into a baseband signal, where N is an integer greater than or equal to 1.

3. The method according to claim 2, characterized in that The sum of the bandwidths used by the M transmit channels is equal to the sum of the bandwidths used by the N receive channels.

4. The method according to claim 2, characterized in that N is less than the number of available receive channels and / or the bandwidth used by the receive channels is less than the available bandwidth of the receive channels.

5. The method according to any one of claims 1 to 4, characterized in that: The mapping of the first signal to M transmit channels includes: mapping the first signal to the M transmit channels according to a first mapping strategy.

6. The method according to claim 5, characterized in that The first mapping strategy includes M and / or the bandwidth used by the transmit channels.

7. The method according to claim 5, characterized in that It further includes: receiving the first mapping strategy from the baseband unit.

8. The method according to claim 2, characterized in that The aggregating of the signals output from N receive channels into a baseband signal includes: aggregating the signals output from the N receive channels into the baseband signal according to a second mapping strategy.

9. The method according to claim 8, characterized in that The second mapping strategy includes N and / or the bandwidth used by the receive channels.

10. The method according to claim 8 or 9, characterized in that It further includes: receiving the second mapping strategy from the baseband unit.

11. The method according to any one of claims 1 to 4, characterized in that: When the bandwidth used by the transmit channels is less than the available bandwidth of the transmit channels, the bandwidth used by the transmit channels performs frequency switching at different times.

12. The method according to any one of claims 2 to 4, characterized in that: When the bandwidth used by the receive channels is less than the available bandwidth of the receive channels, the bandwidth used by the receive channels performs frequency switching at different times.

13. The method according to any one of claims 1 to 4, characterized in that: The signal of at least one transmit channel among the M transmit channels is output to an antenna unit through multiple transmit branches, and a phase shift control unit is provided on the transmit branches.

14. The method according to any one of claims 2 to 4, characterized in that: At least one receive channel among the N receive channels receives signals from the antenna unit through multiple receive branches, and a phase shift control unit is provided on the receive branches.

15. The method according to any one of claims 1 to 4, characterized in that: The M transmit channels drive all or part of the antenna array.

16. The method according to any one of claims 2 to 4, characterized in that: The N receive channels drive all or part of the antenna array.

17. The method according to any one of claims 1 to 4, characterized in that: The transmit channel is a transmit intermediate frequency channel.

18. The method according to claim 17, characterized in that The receive channel is a receive intermediate frequency channel.

19. The method according to any one of claims 1 to 4, characterized in that P satisfies the following formula: P * carrier bandwidth = M * the bandwidth used by the transmit channels; or, P * carrier bandwidth < M * the bandwidth used by the transmit channels.

20. The method according to any one of claims 2 to 4, characterized in that: The aggregating of the signals output from N receive channels into a baseband signal includes: The signals output by the N receiving channels are mapped to Q sub-carrier channels, and the signals output by the Q sub-carrier channels are aggregated into a baseband signal, where the bandwidth of the sub-carrier channel is one carrier bandwidth, and Q is an integer greater than or equal to 1.

21. The method according to claim 20, characterized in that The Q satisfies the following formula: Q*carrier bandwidth=N*the bandwidth used by the receiving channel; or Q*carrier bandwidth<N*the bandwidth used by the receiving channel.

22. A signal processing method, characterized in that: receiving a second signal from a radio frequency unit and inputting the signal into a receiving channel, aggregating signals output by N receiving channels into a baseband signal, where N is less than the number of available receiving channels and / or a bandwidth used by the receiving channel is less than the available bandwidth of the receiving channel, and N is an integer greater than or equal to 1; The aggregating the signals output by the N receiving channels into a baseband signal comprises: The signals output by the N receiving channels are mapped to Q sub-carrier channels, and the signals output by the Q sub-carrier channels are aggregated into a baseband signal, where the bandwidth of the sub-carrier channel is one carrier bandwidth, and Q is an integer greater than or equal to 1.

23. The method according to claim 22, characterized in that The method further comprises: A first signal is received from a baseband unit, and the first signal is mapped to M transmission channels, where M is an integer greater than or equal to 1.

24. The method according to claim 23, wherein The sum of bandwidths used by the M transmitting channels is equal to the sum of bandwidths used by the N receiving channels.

25. The method according to claim 23, characterized in that The M is smaller than the number of available transmission channels and / or the bandwidth used by the transmission channel is smaller than the available bandwidth of the transmission channel.

26. The method according to any one of claims 22 to 25, characterized in that: The aggregating the signals output by the N receiving channels into a baseband signal comprises: The signals output by the N receiving channels are aggregated into the baseband signal according to a second mapping strategy.

27. The method according to claim 26, characterized in that The second mapping strategy includes N and / or a bandwidth used by the receiving channel.

28. The method according to claim 26, characterized in that Also includes: The second mapping strategy is received from a baseband unit.

29. The method according to claim 23, wherein Mapping the first signal to M transmission channels includes: Mapping the first signal to the M transmission channels according to a first mapping strategy.

30. The method according to claim 29, wherein The first mapping strategy includes the M and / or the bandwidth used by the transmission channel.

31. The method according to claim 29 or 30, characterized in that Also includes: The first mapping strategy is received from a baseband unit.

32. The method according to any one of claims 23 to 25, characterized in that: When the bandwidth used by the receiving channel is smaller than the available bandwidth of the receiving channel, the bandwidth used by the receiving channel is frequency-switched at different times.

33. The method according to any one of claims 23 to 25, characterized in that: When the bandwidth used by the transmission channel is smaller than the available bandwidth of the transmission channel, the bandwidth used by the transmission channel is frequency-switched at different times.

34. The method according to any one of claims 22 to 25, characterized in that: At least one receiving channel among the N receiving channels receives a signal from the antenna unit through a plurality of receiving branches, and a phase shift control unit is provided on the receiving branch.

35. The method according to any one of claims 23 to 25, characterized in that: The signal of at least one transmitting channel among the M transmitting channels is output to the antenna unit through a plurality of transmitting branches, and a phase shift control unit is provided on the transmitting branch.

36. The method according to any one of claims 22 to 25, characterized in that: The N receiving channels drive all or part of the antenna array.

37. The method according to any one of claims 23 to 25, characterized in that: The M transmit channels drive all or part of the antenna array.

38. The method according to any one of claims 22 to 25, characterized in that: The receiving channel is a receiving intermediate frequency channel.

39. The method according to claim 38, characterized in that The transmitting channel is a transmitting intermediate frequency channel.

40. The method according to any one of claims 22 to 25, characterized in that: The Q satisfies the following formula: Q * Carrier Bandwidth = N * Bandwidth used by the receiving channel; or, Q * Carrier Bandwidth < N * Bandwidth used by the receiving channel.

41. The method according to any one of claims 23 to 25, characterized in that: The mapping of the first signal to M transmitting channels includes: Mapping the first signal to P sub - carrier channels, and mapping the signals output from the P sub - carrier channels to the M transmitting channels. The bandwidth of the sub - carrier channel is one carrier bandwidth, and P is an integer greater than or equal to 1.

42. The method according to claim 41, wherein P satisfies the following formula: P * Carrier Bandwidth = M * Bandwidth used by the transmitting channel; or, P * Carrier Bandwidth < M * Bandwidth used by the transmitting channel.

43. A signal processing device, characterized in that Comprising one or more processors and a memory. The memory stores computer - executable instructions that can run on the processor. When the computer - executable instructions are executed by the processor, the signal processing device executes the method according to any one of claims 1 - 21.

44. A signal processing device, characterized in that Comprising one or more processors and a memory. The memory stores computer - executable instructions that can run on the processor. When the computer - executable instructions are executed by the processor, the signal processing device executes the method according to any one of claims 22 - 42.

45. A chip, characterized in that Comprising a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 - 21.

46. A chip, characterized in that Comprising a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 22 - 42.

47. A base station, characterized in that Comprising a baseband unit, an antenna unit, and the signal processing device according to claim 43 or 44, or the chip according to claim 45 or 46.

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