177 results about "Channelized" patented technology

The invention discloses a broadband channelization reception system of radar with an external radiation source and an FPGA (Field Programmable Gate Array) implementation method. The FPGA implementation method comprises the steps of: dividing received radar broadband signals into multiple paths of analogue signals through a power division filter module; transmitting each path of analogue signals after AD (Analogue-Digital) conversion into an FPGA for frequency point separation; converting to a baseband through down-conversation in the FPGA; sequentially carrying out a multi-phase structured deceleration treatment, channelization treatment, FIFO (First In First Out) series and parallel conversion treatment and FFT (Fast Fourier Transformation) on baseband signals; and finally outputting output signals of any eight frequency points through the FPGA. The reception system comprises a power division filter module, an analogue-digital conversion module and an FPGA frequency point separation module. According to the invention, echo signals of the radar are subjected to a segmental treatment, and the same treatment is adopted for the signal separation process of each path of the analogue signals after the segmentation. Different clock frequencies are adopted at different treatment stages of the FPGA frequency point separation. According to the broadband channelization reception system of the radar with the external radiation source and the FPGA implementation method, disclosed by the invention, the difficulties of great equipment amount and high development cost when the traditional reception system of the radar with the external radiation source implements synchronous reception of multiple signals of the broadband signals are solved; and complexity and cost of the system structure are decreased.

A communications network for transporting data packets among L2 / L3 nodes based on dynamically L1-channelizable multi-source buses. The dynamic channelization of a packet transport bus among source-node-specific L1 connections is managed by a bus control process, which periodically optimizes the allocation of bus capacity pool among the source nodes based on real-time bus capacity demand figures by the source nodes of the bus. The invention provides means for real-time dynamic, traffic load adaptive allocation of transport network capacity to continuously maximize the data throughput of the transport network for dynamic packet traffic, such as Internet traffic.

A mobile communication system, base station device, and mobile wireless terminal are provide which are capable of improving throughput and / or communication quality in the mobile wireless terminal when an HSDPA (High Speed Downlink Packet Access) method is applied to W-CDMA (Wideband Code Division Multiple Access) communication. A base station device transmits an empty pattern of a channelization code set for an HS-SCCH (High Speed Shared Control CHannel), which is used as an advance notice of transmission for a downlink employed in the HSDPA method, to the mobile wireless terminal. The mobile wireless terminal, when having received the advance notice of transmission for the downlink employed in the HSDPA method from the base station device, adds assumed power for transmission of the HS-DPCCH (High Speed Dedicated Physical Control CHannal) data to the estimated transmission power value to be used for judgement as to whether a TFC (Transport Format Combination) of a DPCH (Dedicated Physical CHannel) is usable or not.

A mobile communication system, base station device, and mobile wireless terminal are provide which are capable of improving throughput and / or communication quality in the mobile wireless terminal when an HSDPA (High Speed Downlink Packet Access) method is applied to W-CDMA (Wideband Code Division Multiple Access) communication. A base station device transmits an empty pattern of a channelization code set for an HS-SCCH (High Speed Shared Control CHannel), which is used as an advance notice of transmission for a downlink employed in the HSDPA method, to the mobile wireless terminal. The mobile wireless terminal, when having received the advance notice of transmission for the downlink employed in the HSDPA method from the base station device, adds assumed power for transmission of the HS-DPCCH (High Speed Dedicated Physical Control CHannal) data to the estimated transmission power value to be used for judgement as to whether a TFC (Transport Format Combination) of a DPCH (Dedicated Physical CHannel) is usable or not.

A communication system includes a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal. The system generates a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigns the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets. Upon detecting necessity to modify a control channel set to be assigned to a particular UE among the UEs, a Node B determines to modify a control channel set assigned into the UE to a new control channel set at a predetermined point of time to come. After determining to modify the control channel set, the Node B transmits an indicator indicating expected modification of the control channel set and information on the control channel set to be modified to the UE over a downlink.

The present invention is to provide a communication channel with a low inter-cell interference while suppressing variation in the amount of inter-cell interference. Provided is a base station arranged in a radio communication system configured to implement a frequency division multiple access method by using a frequency division multiplexing method as a modulation method, and configured of cells each divided into an inner region and an outer region. The base station includes an allocation controller configured to perform subchannelization using a perfectly-orthogonal channel in the outer region of the cell, and to perform subchannelization using a quasi-orthogonal channel in the inner region of the cell.

Provided are an uplink control information transmission method, a user equipment, and a network-side device. The uplink control information transmission method of the present invention comprises: determining a destination code channel from multiple preset code channels; and sending uplink information to a network-side device through the destination code channel, the uplink information comprising first information and second information, an information bit transmitted through the destination code channel bearing the first information, and a channelization code of the destination code channel bearing the second information. The embodiments of the present invention improve the uplink throughput of a UE.

In one embodiment of managing the use of channelization codes during soft handoff of a mobile station from a transferring network station to a candidate network station, a determination is made as to whether a field associated with an existing channelization code used by the candidate network station is unused and meets timing criteria associated with a corresponding field received by the mobile station from the transferring network station. Based on this determination, a channelization code for use by the candidate network station in communicating with the mobile station is assigned.

A system and method for coordinating radio resource usage in an unlicensed frequency band (24) is provided. Specifically, under the present invention, a set of spectrum etiquette rules is provided that govern how radio systems (20A-C) operate within unlicensed frequency bands (24). In a typical embodiment, the set of spectrum etiquette rules can accommodate radio systems (20A-C) operating at varying channel bandwidths. To this extent, the set of spectrum etiquette rules generally includes: a channel switching rule; a bandwidth selection rule; a power selection rule; a deferring listen before talk (LBT) rule; a channelized LBT rule; and a synchronized LBT rule.

Various embodiments described herein are directed to methods and systems for multibeam adaptive antenna architectures for recovering user signals in the coverage area of the antenna in the presence of interference sources. For example, various embodiments may utilize an architecture comprised of an array of antenna feeds, an RF to baseband conversion subsystem, a bank of digital beamformers, a channelization subsystem, a bank of weighted combiners, and a bank of demodulators for the demodulation and detection of user signals. The multiple beamformers introduce nulls in the direction of interference sources based on distinct adaptive algorithms for providing different antenna beam patterns after adaptation. Various other embodiments may utilize architecture for providing the directions of the interference sources or intentional jammers.

The invention discloses an efficient microwave photon channelization receiving method, and relates to the technical field of microwaves and the technical field of optical communication. The method isas shown in figure 1 in the specification, and a laser, a Mach-Zehnder modulator, a dual-parallel Mach-Zehnder modulator, a dual-polarization Mach-Zehnder modulator, a polarization controller, an erbium-doped fiber optical amplifier, a wavelength division multiplexer, a dual-polarization 90-degree optical coupler, a balance photoelectric detector, an electric 90-degree coupler and an electric band-pass filter are included. A plurality of radio frequency signals are copied through polarized orthogonal radio frequency optical combs, local oscillator optical combs and corresponding radio frequency copies are subjected to frequency mixing, the positions and intervals of the two sets of optical combs and the wavelength division multiplexer are controlled, and channelized receiving of broadbandsignals can be achieved through a mirror image suppression demodulation module. According to the invention, the problems of complex system and serious crosstalk in a photon filter bank scheme are overcome, the technical difficulty that multi-comb lines and large-interval optical combs are difficult to generate in a conventional double-optical-comb scheme is overcome, and the method has potential application value in the fields of investigation, radars and the like.

Methods and apparatus for downlink Physical Hybrid Automatic Repeat-reQuest (HARQ) Indicator Channel (PHICH) mapping and channelization in a communication system. First, a base station assigns uplink (UL) physical resource block (PRB) indices to a set of units of user equipment in a cell. Then, for each user equipment, the base station calculates an index triple (KPHICH,0,KPHICH,1,KPHICH,2) for three repetitions of a PHICH signal to be transmitted to the user equipment, with KPHICH, i being a PHICH index indicating a PHICH resource for transmitting the i-th repetition of the PHICH signal to the user equipment, and i=1, 2, 3. When a data packet is received from a unit of user equipment transmitted via at least one physical resource block (PRB) indicated by the at least one PRB index that is assigned to the user equipment, the base station transmits PHICH signals to the user equipment by using the PHICH resources indicated by the PHICH indices assigned to the user equipment.

The invention discloses a large-dynamic ultra-wideband digital instantaneous frequency measurement method. The method adopts a radio frequency division technology and is combined with a channelized digital frequency measurement method, so that the covered frequency band is wide, the interception probability is high, and the high frequency resolution can be kept. The method selects 32 paths of digital channelization, so that the frequency measurement delay is ensured not to exceed 1 microsecond and the frequency measurement precision is within the range of 1 MHz. A radio frequency division module carries out three-stage amplification and equalization on an input 1-18 GHz radio frequency signal firstly, so that the input amplitude dynamic range is compressed through the design, and the dynamic range of the input signal is -45 dBm to 0 dBm, and the dynamic range is compressed to -5 dBm to 0 dBm after multi-stage amplification and equalization; and meanwhile, the deterioration of a signal-to-noise ratio is reduced; and furthermore, the amplitude flatness of 1 to 18 GHz of an ultra-wideband signal is ensured, so that the power of full-band signals sent to a frequency divider is within the normal working range of the frequency divider.

The invention discloses a reconnaissance and interference integrated system, and a method comprises the following steps: dividing a received signal into sub-bands through a front-end analog channelization structure, performing down-conversion processing to obtain a baseband signal, mixing the baseband signal with a frequency mixing sequence, and performing summing to obtain a summed signal, so that the data volume is greatly reduced, and the sampling data rate is reduced; enabling the summed signal to be subjected to interference of a specified interference pattern to obtain an interference signal, so that the interference bandwidth is reduced, and the interference can still cover the full frequency band of the reconnaissance signal; mixing the interference signal with the periodic mixingsequence to obtain an interference mixing signal; performing up-conversion processing on the interference mixing signal to obtain an interference modulation signal, so the frequency spectrum of the interference signal is shifted to each sub-band; enabling the interference modulation signal to pass through a filter bank and performing summing to obtain a final interference signal. Compared with a traditional reconnaissance receiver and a jammer, the system can reduce the sampling rate, simplify the transmitting and receiving channel structure and achieve multi-band multi-signal simultaneous interference.

A method and apparatus in a UE for detecting active channelization codes including channelization codes used by other UEs, which are different from at least one channelization code assigned to the UE, for transmission / reception to / from a Node B in an assigned time slot in a mobile communication system, where each of time slots of a radio channel frame is identified by a plurality of code channels, each having a unique channelization code. Accordingly, a channelization code set is formed to include a predetermined number of channelization codes to be searched, code channel data corresponding to the channelization codes is detected from a received signal, the code power of the code channel data is measured and compared with a predetermined threshold, and channelization codes having code power values exceeding the threshold are selected as active channelization codes.

The present invention discloses a broadband digital channelization parallel processing method based on a serial FFT IP core, and gives a method for designing a parallel FFT IP core based on the serial FFT core. According to the method disclosed by the present invention, after broadband signals intercepted by an electronic signal reconnaissance receiver are sampled by using a high-speed AD, data is grouped; parallel-serial conversion pipeline processing of the data is performed in groups; the parallel data is transformed into the serial data; and meanwhile, pipeline conversion processing can be guaranteed to be uninterruptedly carried out on the input parallel in a time sequence so as to achieve an effect of parallel data input and parallel data output. Moreover, due to a determined sequential relationship of the input data and output data, continuous input and continuous output of data flow are guaranteed. In a process of FPGA program verification, parameters, such as a bit width processed in each stage, a coefficient of a channel filter, a bit width of the channel filter, a bit width of an FFT twiddle factor and the like, are continuously modified, and under a situation of meeting design indexes, a resource occupation rate is reduced to the greatest extent.