Mobile device, cellular transceiver, and method for coexistence management in mobile device

Abstract

This invention provides a radio frequency (RF) communication system with coexistence management. In some embodiments, a mobile device includes a first antenna, a first front-end system receiving an RF received signal from the first antenna, a first transceiver coupled to the first front-end system, a second antenna, a second front-end system providing an RF transmitted signal to the second antenna, and a second transceiver coupled to the second front-end system. The second front-end system observes the RF transmitted signal to generate an RF observation signal, which is down-converted and processed by the second transceiver to generate digital observation data provided to the first transceiver. The first transceiver down-converts the RF received signal to the baseband and compensates the baseband received signal for a certain amount of RF signal leakage indicated by the digital observation data.

Description

Technical Field

[0001] Embodiments of the present invention relate to electronic systems and, more particularly, to radio frequency electronic devices. Prior Art

[0002] Radio frequency (RF) communication systems can be used to transmit and / or receive signals having a wide range of frequencies. For example, an RF communication system can be used to wirelessly communicate RF signals in a frequency range of approximately 30 kHz to 300 GHz, such as in the range of approximately 410 MHz to approximately 7.125 GHz for fifth generation (5G) frequency range 1 (FR1) communications.

[0003] Examples of RF communication systems include, but are not limited to, mobile phones, tablet computers, base stations, network access points, customer premises equipment (CPE), laptop computers, and wearable electronic devices. Summary of the Invention

[0004] In certain embodiments, the present invention relates to a mobile device. The mobile device includes: a first antenna; a second antenna; a first front-end system configured to process a radio frequency (RF) receive signal from the first antenna; and a first transceiver configured to further process the RF receive signal to generate a first digital baseband receive signal. The first transceiver includes a discrete-time cancellation circuit configured to compensate the first digital baseband receive signal for RF signal leakage based on digital observation data. The mobile device further includes: a second front-end system configured to process a RF transmit signal for transmission on the second antenna and generate a RF observation signal based on observing the RF transmit signal; and a second transceiver configured to process the RF observation signal to generate the digital observation data and provide the digital observation data to the first transceiver.

[0005] In some embodiments, the discrete-time cancellation circuit includes a spectrum regrowth modeling circuit configured to estimate an amount of aggressor spectrum regrowth present in the RF receive signal based on the digital observation data. According to several embodiments, the spectrum regrowth modeling circuit is configured to estimate the amount of aggressor spectrum regrowth based on modeling adjacent channel leakage rates using predistortion.

[0006] In some embodiments, the second transceiver is configured to generate a digital observation signal based on the RF observation signal, and the second transceiver includes a baseband sampling circuit configured to sample the digital observation signal to generate the digital observation data. According to various embodiments, the baseband sampling circuit generates the digital observation data to reflect an amount of direct transmission leakage present in the RF transmission signal.

[0007] In some embodiments, the second front-end system includes a directional coupler configured to generate the RF observation signal. According to several embodiments, the directional coupler generates the RF observation signal based on a forward coupling path to the second antenna.

[0008] In some embodiments, the first front-end system is a cellular front-end system and the second front-end system is a WiFi front-end system.

[0009] In various embodiments, the first front-end system is a WiFi front-end system and the second front-end system is a cellular front-end system.

[0010] In several embodiments, the second transceiver is configured to compensate a second baseband receive signal for RF signal leakage based on additional digital observation data from the first transceiver. According to several embodiments, the first transceiver is configured to receive a sensed RF signal from a directional coupler of the first front-end system and process the sensed RF signal to generate the additional digital observation data provided to the second transceiver. According to several embodiments, the first front-end system includes a duplexer, the directional coupler positioned between an output of the duplexer and the first antenna. According to some embodiments, the first front-end system includes a duplexer and a power amplifier, the directional coupler positioned between an output of the power amplifier and an input to the duplexer.

[0011] In certain embodiments, the present invention relates to a transceiver comprising: a receive channel configured to process a radio frequency receive signal to generate a digital baseband receive signal; an observation channel configured to process a radio frequency observation signal to generate a digital observation signal; a baseband sampling circuit configured to sample the digital observation signal to generate first digital observation data; an output configured to output the first digital observation data; an input configured to receive second digital observation data; and a discrete-time cancellation circuit configured to compensate the digital baseband receive signal for radio frequency signal leakage based on the second digital observation data.

[0012] In various embodiments, the discrete-time cancellation circuit includes a spectrum regrowth modeling circuit configured to estimate an amount of aggressor spectrum regrowth present in the RF receive signal based on the second digital observation data. According to several embodiments, the spectrum regrowth modeling circuit is configured to estimate the amount of aggressor spectrum regrowth based on modeling adjacent channel leakage rates using predistortion.

[0013] In some embodiments, the second digital observation data indicates an amount of direct transmission leakage present in an aggressor RF transmission signal.

[0014] According to several embodiments, the transceiver further includes a transmission channel configured to generate a radio frequency transmission signal.

[0015] In several embodiments, the transceiver is implemented as a cellular transceiver.

[0016] In some embodiments, the transceiver is implemented as a WiFi transceiver.

[0017] In certain embodiments, the present invention relates to a method for coexistence management in a mobile device, the method comprising: providing a radio frequency (RF) receive signal from a first front-end system to a first transceiver; processing the RF receive signal using the first transceiver to generate a first digital baseband receive signal; compensating the first digital baseband receive signal for RF signal leakage based on digital observation data using a discrete-time cancellation circuit of the first transceiver; generating a RF observation signal based on observing a RF transmit signal using a second front-end system; and processing the RF observation signal using a second transceiver to generate the digital observation data.

[0018] In various embodiments, the method further includes providing the digital observation data from the second transceiver to the first transceiver.

[0019] In several embodiments, the method further includes compensating the first digital baseband receive signal including estimating an amount of aggressor spectral regrowth present in the RF receive signal based on the digital observation data using a spectral regrowth modeling circuit. According to some embodiments, estimating the amount of aggressor spectral regrowth includes modeling adjacent channel leakage rate using predistortion.

[0020] In various embodiments, processing the RF observation signal to generate the digital observation data includes generating a digital observation signal based on the RF observation signal and sampling the digital observation signal to generate the baseband observation data. According to several embodiments, the method further includes generating the digital observation data to reflect an amount of direct transmission leakage present in the RF transmission signal.

[0021] In some embodiments, the method further includes generating the radio frequency observation signal using a directional coupler of the second front-end system.

[0022] In some embodiments, the first front-end system is a cellular front-end system and the second front-end system is a WiFi front-end system.

[0023] In several embodiments, the first front-end system is a WiFi front-end system and the second front-end system is a cellular front-end system.

[0024] In various embodiments, the method further includes compensating a second baseband receive signal of the second transceiver for RF signal leakage based on additional digital observations from the first transceiver. Simple diagram description

[0025] FIG. 1 is a schematic diagram of an example of a mobile device communicating via cellular and WiFi networks.

[0026] FIG. 2 is a schematic diagram illustrating an example of signal leakage in an RF communication system.

[0027] FIG. 3A is a diagram illustrating an example of direct transmission leakage in an RF communication system.

[0028] FIG. 3B is a schematic diagram illustrating an example of regrowth leakage in an RF communication system.

[0029] FIG4A is a schematic diagram of an RF communication system with coexistence management according to an embodiment.

[0030] FIG. 4B is a schematic diagram of an RF communication system with coexistence management according to another embodiment.

[0031] FIG5 is a schematic diagram of an RF communication system with coexistence management according to another embodiment.

[0032] FIG6 is a schematic diagram of an RF communication system with coexistence management according to another embodiment.

[0033] FIG. 7 is a schematic diagram of an RF communication system with coexistence management according to another embodiment.

[0034] FIG8 is a schematic diagram of an embodiment of a mobile device with coexistence management.

[0035] FIG. 9A is a schematic diagram of an embodiment of a packaging module with coexistence management.

[0036] FIG. 9B is a schematic diagram of a cross section of the package module of FIG. 9A taken along line 9B-9B. Implementation Method

[0037] The following detailed description of certain embodiments presents various descriptions of specific embodiments. However, the innovations described herein can be embodied in a wide variety of ways, for example, as defined and encompassed by the claims. In this description, reference is made to the drawings, where like reference numerals may indicate identical or functionally similar elements. It will be understood that the elements depicted in the drawings are not necessarily drawn to scale. Furthermore, it will be understood that certain embodiments may include more than one element depicted in a drawing and / or a subset of the elements depicted in a drawing. Furthermore, some embodiments may incorporate any suitable combination of features from two or more drawings.

[0038] Figure 1 is a schematic diagram of an example of a mobile device 2a communicating via cellular and WiFi networks. For example, as shown in Figure 1, mobile device 2a communicates with a base station 1 in a cellular network and with a WiFi access point 3 in a WiFi network. Figure 1 also depicts examples of other user equipment (UE) communicating with base station 1, such as a wirelessly connected car 2b and another mobile device 2c. Furthermore, Figure 1 also depicts examples of other WiFi-enabled devices communicating with WiFi access point 3, such as a laptop computer 4.

[0039] While specific examples of cellular UEs and WiFi-enabled devices are shown, a wide variety of devices may communicate using cellular and / or WiFi networks. Examples of such devices include, but are not limited to, mobile phones, tablets, laptops, Internet of Things (IoT) devices, wearable electronics, customer premises equipment (CPE), wirelessly connected cars, wireless repeaters, and / or a wide variety of other communication devices.

[0040] In some embodiments, a UE (such as mobile device 2a in FIG. 1 ) is implemented to support communication using a variety of technologies, including but not limited to 2G, 3G, 4G (including LTE, LTE-Advanced, and LTE-Advanced Pro), 5G NR, WLAN (e.g., WiFi), WPAN (e.g., Bluetooth and ZigBee), WMAN (e.g., WiMax), and / or GPS. In some embodiments, enhanced Licensed Assisted Access (eLAA) is used to aggregate one or more licensed frequency carriers (e.g., licensed 4G LTE and / or 5G NR frequencies) with one or more unlicensed carriers (e.g., unlicensed WiFi frequencies).

[0041] Furthermore, a particular UE can communicate not only with base stations and access points, but also with other UEs. For example, a wirelessly connected car 2b can communicate with a wirelessly connected pedestrian 2d, a wirelessly connected stop light 2e, and / or another wirelessly connected car 2f using vehicle-to-vehicle (V2V) and / or vehicle-to-everything (V2X) communications.

[0042] Although various examples of communication techniques have been described, mobile devices can be implemented to support a wide range of communications.

[0043] Various communication links are depicted in Figure 1. Communication links can be duplexed in a wide variety of ways, including, for example, using frequency division duplexing (FDD) and / or time division duplexing (TDD). FDD is a type of radio frequency communication that uses different frequencies for transmitting and receiving signals. FDD offers several advantages, such as high data rates and low latency. In contrast, TDD is a type of radio frequency communication that uses approximately the same frequency for transmitting and receiving signals, with the transmission and reception of signals switched in time. TDD offers several advantages, such as efficient use of spectrum and flexible allocation of processing between transmit and receive directions.

[0044] Different users of the illustrated communication network can share available network resources, such as available spectrum, in a wide variety of ways. In one example, frequency division multiple access (FDMA) is used to divide a frequency band into multiple frequency carriers. Furthermore, one or more carriers are assigned to a specific user. Examples of FDMA include, but are not limited to, single-carrier FDMA (SC-FDMA) and orthogonal FDMA (OFDMA). OFDM is a multicarrier technology that subdivides the available bandwidth into multiple, mutually orthogonal, narrowband subcarriers that can be individually assigned to different users.

[0045] Other examples of shared access include, but are not limited to, time division multiple access (TDMA), in which a user is assigned a specific time slot for using a frequency resource; code division multiple access (CDMA), in which a frequency resource is shared among different users by assigning a unique code to each user; spatial domain multiple access (SDMA), in which beamforming is used to provide shared access through spatial division; and non-orthogonal multiple access (NOMA), in which power domain multiple access is used. For example, NOMA can be used to serve multiple users using the same frequency, time, and / or code, but using different power levels. [Example of a RF system with coexistence management] []

[0046] Radio frequency (RF) communication systems may include multiple transceivers for communicating using different wireless networks, across multiple frequency bands, and / or using different communication standards. While implementing an RF communication system in this manner can expand functionality, increase bandwidth, and / or enhance flexibility, several coexistence issues can arise between the transceivers operating within the RF communication system.

[0047] For example, an RF communication system may include a cellular transceiver for processing RF signals for communication via a cellular network and a wireless local area network (WLAN) transceiver for processing RF signals for communication via a WLAN network (such as a WiFi network). For example, the mobile device 2a of Figure 1 is operable to communicate using both cellular and WiFi networks.

[0048] While implementing an RF communication system in this manner may provide several benefits, a mutual desensitization effect may result from cellular transmissions interfering with the reception of WiFi signals and / or from WiFi transmissions interfering with the reception of cellular signals.

[0049] In one example, cellular Band 7 can cause mutual desensitization relative to 2.4 GHz WiFi. For example, Band 7 uses FDD duplexing and operates in a frequency range of approximately 2.62 GHz to 2.69 GHz for the downlink and in a frequency range of approximately 2.50 GHz to approximately 2.57 GHz for the uplink, while 2.4 GHz WiFi uses TDD duplexing and operates in a frequency range of approximately 2.40 GHz to approximately 2.50 GHz. Therefore, the frequencies of cellular Band 7 and 2.4 GHz WiFi are adjacent, and RF signal leakage from the high-power transmitter of one transceiver / front end, particularly at the edge frequency channels, can impact the receiver performance of the other transceiver / front end.

[0050] In another example, cellular Band 40 and 2.4 GHz WiFi can cause mutual desensitization. For example, Band 40 uses TDD duplexing and operates in a frequency range of approximately 2.30 GHz to approximately 2.40 GHz, while 2.4 GHz WiFi uses TDD duplexing and operates in a frequency range of approximately 2.40 GHz to approximately 2.50 GHz. Therefore, the frequencies of cellular Band 40 and 2.4 GHz WiFi are close together, causing several coexistence issues, especially at the boundary frequency channels.

[0051] Desensitization can occur not only from direct leakage of an aggressor's transmitted signal to a victim's receiver, but also from spectral regrowth components generated in the transmitter. This interference can be located relatively close in frequency to the victim's received signal and / or directly overlap with it. While a receive filter can provide some filtering of signal leakage, it can also provide insufficient attenuation of the aggressor's signal and, therefore, desensitize the victim's receiver.

[0052] Conventional technologies alone are insufficient to provide mutual coexistence. In one example, a very high-quality factor (high-Q) bandpass filter (e.g., an acoustic bandpass filter) can be included at the output of a power amplifier of an aggressor transmitter to attenuate spectral regrowth. When the attenuation provided by the filter is sufficiently high, the victim receiver may not be significantly desensitized due to the nonlinearities of the aggressor transmitter. However, such high-Q bandpass filters can be extremely expensive and / or introduce insertion loss that degrades transmission performance.

[0053] In another example, a very high-Q bandpass filter can be included on the victim receiver to attenuate high-power leakage coupled from the aggressor transmitter. When the attenuation is high enough, the victim receiver is not significantly desensitized by the high-power leakage coupling into the victim receiver's nonlinear receive circuitry. However, such high-Q bandpass filters can be extremely expensive and / or introduce insertion loss that degrades receiver sensitivity.

[0054] An RF communication system with coexistence management is provided herein. In certain embodiments, a mobile device includes a first antenna, a first front-end system that receives an RF receive signal from the first antenna, a first transceiver coupled to the first front-end system, a second antenna, a second front-end system that provides an RF transmit signal to the second antenna, and a second transceiver coupled to the second front-end system. The second front-end system observes the RF transmit signal to generate an RF observation signal, which is down-converted and processed by the second transceiver to generate digital observation data that is provided to the first transceiver. The first transceiver down-converts the RF receive signal to baseband and compensates the baseband receive signal for an amount of RF signal leakage indicated by the digital observation data.

[0055] By implementing the mobile device in this manner, compensation is provided for signal leakage resulting from signal coupling from the second antenna to the first antenna. Thus, when the first transceiver receives and the second transceiver transmits, the mobile device operates with enhanced receiver sensitivity.

[0056] In certain embodiments, a first transceiver / first front-end system may process a different type of RF signal than a second transceiver / second front-end system. In one example, the first transceiver / first front-end system processes cellular signals while the second transceiver / second front-end system processes WLAN signals (such as WiFi signals). Therefore, certain embodiments herein provide for coexistence management between cellular and WiFi radios.

[0057] In some embodiments, the first transceiver processes the digital observation data to detect direct transmission leakage. For example, the digital observation data may include extracted samples of the aggressor's direct transmission leakage.

[0058] Therefore, the digital observation signal can be used to compensate for direct transmission leakage. In certain embodiments, the first transceiver includes a spectrum regrowth model for estimating spectrum regrowth leakage based on the digital observation data. In one example, the spectrum regrowth model is generated by predistortion (e.g., by modeling the adjacent channel leakage rate (ACLR) such as ACLR2). Thus, multiple components of RF signal leakage can be compensated.

[0059] In certain implementations, discrete-time cancellation is used to compensate for baseband received signals. For example, compensation can be provided using a discrete-time cancellation loop with multiple inputs. The cancellation loop can be adapted to reduce undesired signal components using any suitable cancellation algorithm, including but not limited to a least mean square (LMS) algorithm. In one embodiment, a transceiver includes a discrete-time cancellation circuit comprising a finite impulse response (FIR) filter having coefficients that adapt over time to reduce or eliminate RF signal leakage.

[0060] The RF observation signal can be generated in a wide variety of ways. In one example, the second front-end system includes a directional coupler along an RF signal path to the second antenna. Furthermore, the directional coupler generates the RF observation signal based on sensing an outgoing RF signal from the second antenna. Therefore, the RF observation signal can be generated based on a forward coupling path of the second directional coupler.

[0061] The second transceiver can also be implemented using circuitry for compensating for RF signal leakage. For example, the first front-end system can observe an outgoing transmit signal from the first antenna to generate a second RF observation signal. The first transceiver downconverts this second RF observation signal to generate second digital observation data, which is provided to the second transceiver. Additionally, the second transceiver downconverts an incoming receive signal from the second antenna to generate a second baseband receive signal. The second transceiver compensates this second baseband receive signal for RF signal leakage based on the second digital observation data. Therefore, in certain embodiments, both the first and second transceivers operate using coexistence management.

[0062] In certain implementations, the observation path used for power control (e.g., transmit power control, or TPC) and / or predistortion control (e.g., digital predistortion, or DPD) is also used for RF signal observation. By implementing the RF communication system in this manner, circuitry is reused. This not only reduces cost and / or component count, but also avoids inserting additional circuitry into the RF signal path, which could otherwise degrade receiver sensitivity and / or transmitter efficiency.

[0063] The coexistence management schemes described herein can provide several advantages. For example, the coexistence management scheme can reduce the amount of receive filtering and / or transmitter filtering, thereby relaxing filter constraints and allowing the use of lower-cost filters. Furthermore, compensation for RF signal leakage enhances receiver sensitivity and / or transmitter efficiency with little to no increase in power consumption and / or componentry in the RF signal path. Furthermore, a common cancellation circuit can be used to compensate for multiple types of aggressor leakage components, thereby providing a centralized and efficient mechanism for coexistence management.

[0064] FIG2 is a schematic diagram illustrating an example of signal leakage in an RF communication system 70. As shown in FIG2 , the RF communication system 70 includes a first transceiver 51, a second transceiver 52, a first front-end system 53, a second front-end system 54, a first antenna 55, and a second antenna 56.

[0065] Including multiple transceivers, front-end systems, and antennas can enhance the flexibility of the RF communication system 70. For example, implementing the RF communication system 70 in this manner can allow the RF communication system 70 to communicate using different types of networks (e.g., cellular and WiFi networks).

[0066] In the illustrated embodiment, the first front-end system 53 includes a transmit front-end circuit 61, a receive front-end circuit 63, and an antenna access circuit 65. The antenna access circuit 65 may include one or more switches, duplexers, and / or other circuits for controlling access of the transmit front-end circuit 61 and the receive front-end circuit 63 to the first antenna 55. The second front-end system 54 includes a transmit front-end circuit 62, a receive front-end circuit 64, and an antenna access circuit 66.

[0067] Although one exemplary implementation of the front-end system is shown in FIG2 , the teachings herein are applicable to implementing the front-end system in a wide variety of ways. Therefore, other implementations of the front-end system are possible.

[0068] Several coexistence issues can arise from RF signal leakage 69 between the first antenna 55 and the second antenna 56. The coexistence management scheme herein provides compensation to reduce or eliminate the effects of this RF signal leakage.

[0069] 3A is a schematic diagram illustrating an example of direct transmission leakage of an RF communication system 80. The RF communication system 80 includes a power amplifier 81, a victim receiver 82, a first antenna 83, and a second antenna 84.

[0070] In this example, the RF signal output from the power amplifier 81 serves as an aggressor transmission signal close in frequency to the RF signal processed by the victim receiver 82. Therefore, direct transmission leakage from the aggressor transmission signal causes a degradation in receiver sensitivity.

[0071] 3B is a diagram illustrating an example of regrowth leakage in an RF communication system 90 . The RF communication system 90 includes a power amplifier 81 , a victim receiver 82 , a first antenna 83 , and a second antenna 84 .

[0072] In this example, power amplifier 81 receives an RF input signal, which is amplified by power amplifier 81 to generate an RF output signal that is wirelessly transmitted by first antenna 83. Furthermore, the nonlinearity of power amplifier 81 causes spectral regrowth in the RF output signal that is close in frequency to the RF signal processed by victim receiver 82. Consequently, regrowth leakage from the RF output signal causes a degradation in receiver sensitivity.

[0073] 4A is a schematic diagram of an RF communication system 150 with coexistence management according to one embodiment. RF communication system 150 includes a first baseband modem 101, a first transceiver 103, a first front-end system 105, a first antenna 107, a second baseband modem 102, a second transceiver 104, a second front-end system 106, and a second antenna 108.

[0074] In the illustrated embodiment, the first transceiver 103 includes a leakage correction circuit 110, a transmit channel 111, and a receive channel 114. Furthermore, the first front-end system 105 includes a transmit front-end circuit 115, a receive front-end circuit 118, and an antenna access circuit 122. Furthermore, the second transceiver 104 includes a transmit channel 131, an observation channel 132, and a receive channel 134. Furthermore, the second front-end system 106 includes a transmit front-end circuit 135, an observation front-end circuit 136, a receive front-end circuit 138, a directional coupler 141, and an antenna access circuit 142.

[0075] Although one embodiment of circuitry for a front-end system and transceiver is shown, the teachings herein are applicable to implementing the front-end system and transceiver in a wide variety of ways. Thus, other implementations are possible.

[0076] In the illustrated embodiment, the first front-end system 105 receives an RF receive signal from the first antenna 107. The RF receive signal is processed by the receive front-end circuit 118 and provided to the receive channel 114 of the first transceiver 103.

[0077] 4A , baseband transmission data from the second baseband modem 102 is provided to the transmit channel 131 of the second transceiver 104. The transmit channel 131 processes the baseband transmission data to generate an RF input signal to the transmit front-end circuit 135. The RF input signal is processed by the transmit front-end circuit 135 to generate an RF transmission signal that is provided to the second antenna 108.

[0078] 4A , directional coupler 141 senses the RF transmission signal output by transmit front-end circuit 135. Additionally, the signal sensed by directional coupler 141 is processed by observation front-end circuit 136 and observation channel 132 to generate digital observation data that is provided to leakage correction circuit 110.

[0079] 4A , the receive channel 114 of the first transceiver 103 processes the RF receive signal from the first front-end system 105 to generate a baseband receive signal that is used as an input to the leakage correction circuit 110 .

[0080] The leakage correction circuit 110 compensates the baseband receive signal for RF signal leakage based on the digital observation data from the second transceiver 104. In addition, the leakage correction circuit 110 provides a compensated baseband receive signal to the first baseband modem 101 for further processing.

[0081] In some implementations, the leakage correction circuit 110 uses digital observation data to detect direct transmission leakage. For example, the digital observation data may include extracted samples of the aggressor direct transmission leakage associated with the RF transmission signal wirelessly transmitted on the second antenna 108.

[0082] Thus, the digital observation signal can be used to compensate for direct transmission leakage. In the illustrated embodiment, the leakage correction circuit 110 includes a spectrum regrowth modeling circuit 119 for estimating spectrum regrowth leakage based on the digital observation data. In one example, the spectrum regrowth modeling circuit 119 includes a spectrum regrowth model generated by predistortion (e.g., by modeling ACLR2).

[0083] Thus, the leakage correction circuit 110 may be used to provide compensation for multiple components of RF signal leakage, thereby providing a centralized and efficient mechanism for coexistence management.

[0084] 4A , the RF observation signal is generated based on a forward coupling path to the second antenna 108. For example, the RF observation signal is generated based on the directional coupler 141 sensing an outgoing RF signal to the second antenna 108.

[0085] In certain embodiments, baseband modem 101, first transceiver 103, first front-end system 105, and first antenna 107 process a first type of RF signal, while second baseband modem 102, second transceiver 104, second front-end system 106, and second antenna 108 process a second type of RF signal. In one example, the first type of RF signal is a cellular signal, and the second type of RF signal is a WLAN signal (such as a WiFi signal). In a second example, the first type of RF signal is a WLAN signal, and the second type of RF signal is a cellular signal. While two examples of RF signal types have been provided, RF communication system 150 can operate using other RF signal types. Therefore, other embodiments are possible.

[0086] 4B is a schematic diagram of an RF communication system 160 with coexistence management according to another embodiment. The RF communication system 160 of FIG4B is similar to the RF communication system 150 of FIG4A, except that the RF communication system 160 illustrates a specific implementation of a leakage correction circuit.

[0087] For example, the RF communication system 160 includes a first transceiver 153 including a discrete-time cancellation circuit 151. In the illustrated embodiment, the discrete-time cancellation circuit 151 receives digital observation data from the second transceiver 104. The discrete-time cancellation circuit 151 compensates a baseband receive signal received from the receive channel 114 to generate a compensated baseband receive signal in which spectral regrowth and / or direct transmission leakage are reduced and / or eliminated.

[0088] FIG4B illustrates an embodiment of coexistence management provided by a discrete-time cancellation loop in RF communication system 160. The cancellation loop can be adapted to reduce unwanted signal components using any suitable cancellation algorithm. While one example of a discrete-time cancellation loop is shown, the teachings herein are applicable to other implementations of coexistence management. In one embodiment, discrete-time cancellation circuit 151 includes an FIR filter having coefficients that adapt over time to reduce or eliminate RF signal leakage.

[0089] FIG5 is a schematic diagram of an RF communication system 170 with coexistence management according to another embodiment. RF communication system 170 includes a first baseband modem 101, a first transceiver 163, a first front-end system 165, a first antenna 107, a second baseband modem 102, a second transceiver 164, a second front-end system 166, and a second antenna 108.

[0090] In the illustrated embodiment, the first transceiver 163 includes a discrete-time cancellation circuit 151, a transmission channel 111, an observation channel 113, and a reception channel 114. Furthermore, the first front-end system 165 includes a transmission front-end circuit 115, an observation front-end circuit 117, a reception front-end circuit 118, a directional coupler 121, and an antenna access circuit 122. Furthermore, the second transceiver 164 includes a discrete-time cancellation circuit 152, a transmission channel 131, an observation channel 132, and a reception channel 134. Furthermore, the second front-end system 166 includes a transmission front-end circuit 135, an observation front-end circuit 136, a reception front-end circuit 138, a directional coupler 141, and an antenna access circuit 142.

[0091] The RF communication system 170 of FIG5 is similar to the RF communication system 160 of FIG4B, except that the RF communication system 170 is implemented to provide discrete-time cancellation not only in the first transceiver 163, but also in the second transceiver 164. Thus, mutual coexistence is provided.

[0092] 5 , directional coupler 121 senses an outgoing RF signal from first antenna 107 to generate a sensed RF signal, which is processed by observation front-end circuit 117 and observation channel 113 to generate digital observation data that is provided to discrete-time cancellation circuit 152 of second transceiver 164. Additionally, the incoming RF signal from second antenna 108 is processed by receive front-end circuit 138 and receive channel 134 to generate a second baseband received signal, which is compensated for RF signal leakage by discrete-time cancellation circuit 152 using the digital observation data from first transceiver 151.

[0093] In certain implementations, the discrete-time cancellation circuit 152 uses digital observation data to detect direct transmission leakage. For example, the digital observation data may include extracted samples of the aggressor's direct transmission leakage associated with the RF transmission signal wirelessly transmitted on the first antenna 107. In the illustrated embodiment, the discrete-time cancellation circuit 152 also includes a spectrum regrowth modeling circuit 159 for estimating spectrum regrowth based on the digital observation data from the first transceiver 163. In one example, the spectrum regrowth modeling circuit 159 includes a spectrum regrowth model generated by predistortion (e.g., by modeling ACLR2).

[0094] 6 is a diagram of an RF communication system 450 with coexistence management according to another embodiment. RF communication system 450 includes a cellular antenna 301, a WiFi antenna 302, a cellular transceiver 303, a WiFi transceiver 304, a cellular front-end system 305, and a WiFi front-end system 306.

[0095] Although one embodiment of an RF communication system is shown, the teachings herein are applicable to RF communication systems implemented in a wide variety of ways. For example, an RF communication system may include different implementations of antennas, transceivers, and / or front-end systems.

[0096] In the illustrated embodiment, cellular transceiver 303 includes a digital baseband circuit 360, which includes a cellular transmit baseband sampling circuit 361, a cellular transmit power control circuit 363, a discrete time cancellation circuit 381, a digital receiver 382, ​​a digital switch 383, a digital distortion / ACLR generation circuit 384, and a digital mixer 385. Digital receiver 382 is coupled to a cellular modem (not shown in FIG. 6 ). In this example, cellular transceiver 303 operates using frequency band 7 (B7).

[0097] Cellular transceiver 303 further includes an observation channel, which includes an input amplifier 351a, a controllable attenuator 352a, a down-conversion mixer 353a, a low-pass filter 354a, a post-filter amplifier 355a, and an analog-to-digital converter (ADC) 356a. Cellular transceiver 303 further includes a receive channel, which includes an input amplifier 371, a down-conversion mixer 373, a low-pass filter 374, a post-filter amplifier 375, and an ADC 376. As shown in FIG6 , an observation local oscillator (LO) 359 generates an observation LO signal for providing down-conversion in the observation channel, while a receive LO 379 generates a receive LO signal for providing down-conversion in the receive channel.

[0098] The cellular front-end system 305 includes a duplexer 311, a directional coupler 313, and a cellular front-end module 315. The cellular front-end module 315 includes an antenna switching module (ASM) 321, a low-noise amplifier and switch (LNA / SW) 322, a duplexer 323, a power amplifier module 324, a control circuit 325, and a transmission input switch 326.

[0099] Continuing with FIG6 , the WiFi transceiver 304 includes a digital baseband circuit 410, which includes a WiFi transmit baseband sampling circuit 411, a discrete-time cancellation circuit 431, a digital receiver 432, a digital switch 433, a digital distortion / ACLR generation circuit 434, and a digital mixer 435. The digital receiver 432 is coupled to a WiFi modem (not shown in FIG6 ). In this example, the WiFi transceiver 304 operates using 2.4 GHz WiFi.

[0100] WiFi transceiver 304 further includes an observation channel, which includes an input amplifier 401a, a controllable attenuator 402a, a down-conversion mixer 403a, a low-pass filter 404a, a post-filter amplifier 405a, and an ADC 406a. WiFi transceiver 304 further includes a receive channel, which includes an input amplifier 421, a down-conversion mixer 423, a low-pass filter 424, a post-filter amplifier 425, and an ADC 426. As shown in FIG6 , an observation LO 409 generates an observation LO signal for providing down-conversion in the observation channel, while a receive LO 429 generates a receive LO signal for providing down-conversion in the receive channel.

[0101] 6 , a first transceiver-to-transceiver connection 307 and a second transceiver-to-transceiver connection 308 provide connectivity between the cellular transceiver 303 and the WiFi transceiver 304. In certain implementations, the cellular transceiver 303 and the WiFi transceiver 304 are located a relatively long distance from each other, and the connections 307-308 include printed circuit board (PCB) traces and / or cables (e.g., a crossover UE cable).

[0102] The WiFi front-end system 306 includes a duplexer 312 , a directional coupler 314 , and a WiFi front-end module 316 . The WiFi front-end module 316 includes a transmit / receive switch 341 , a power amplifier 342 , and an LNA 343 .

[0103] Continuing with FIG6 , the directional coupler 313 of the cellular front-end system 305 provides sensing of an outgoing cellular signal traveling along a cellular signal path 317 to the cellular antenna 301. The sensed cellular signal from the directional coupler 313 is processed by the cellular transceiver 303 to generate first digital observation data for the WiFi transceiver 304. Additionally, the directional coupler 314 of the WiFi front-end system 306 provides sensing of an outgoing WiFi signal traveling along a WiFi signal path 318 to the WiFi antenna 302. The sensed WiFi signal from the directional coupler 314 is processed by the WiFi transceiver 304 to generate second digital observation data for the cellular transceiver 303.

[0104] The discrete time cancellation circuit 381 of the cellular transceiver 303 and the discrete time cancellation circuit 431 of the WiFi transceiver 304 operate in a manner similar to that described above with respect to FIG. 5 .

[0105] In the illustrated embodiment, the digital baseband circuit 360 of the cellular transceiver 303 includes a distortion / ACLR generation circuit 384 and a digital mixer 385, which corresponds to one embodiment of a spectrum regrowth modeling circuit. Although one embodiment of spectrum regrowth modeling is shown, the teachings herein are applicable to spectrum regrowth modeling implemented in other ways.

[0106] In certain embodiments, the distortion / ACLR generation circuit 384 generates digital distortion / ACLR data based on the second digital observation data received from the WiFi transceiver 304. In certain embodiments, the distortion / ACLR data has a bandwidth greater than a channel bandwidth (e.g., at least approximately twice the channel bandwidth). The digital mixer 385 digitally upconverts the digital distortion / ACLR data to generate data estimating spectral regrowth leakage. In certain embodiments, the digital mixer 385 performs a digital operation representing upconversion to an intermediate frequency (IF).

[0107] In the illustrated embodiment, the digital baseband circuit 410 of the WiFi transceiver 304 includes a distortion / ACLR generation circuit 434 and a digital mixer 435, which corresponds to one embodiment of a spectral regrowth modeling circuit. In certain embodiments, the distortion / ACLR generation circuit 434 generates digital distortion / ACLR data based on first digital observation data received from the cellular transceiver 303. In certain embodiments, the distortion / ACLR data has a bandwidth greater than a channel bandwidth (e.g., at least approximately twice the channel bandwidth). The digital mixer 435 digitally upconverts the digital distortion / ACLR data to generate data estimating spectral regrowth leakage. In certain embodiments, the digital mixer 435 performs a digital operation representing upconversion to an IF frequency.

[0108] FIG7 is a diagram of an RF communication system 500 with coexistence management according to another embodiment. The RF communication system 500 of FIG7 is similar to the RF communication system 450 of FIG6, except that the RF communication system 500 includes a different implementation of a cellular transceiver 451 and a cellular front end 455.

[0109] 6 , the cellular transceiver 451 of FIG. 7 includes an additional observation path, which includes a second input amplifier 351 b, a second controllable attenuator 352 b, a second down-conversion mixer 353 b, a second low-pass filter 354 b, a second post-filtering amplifier 355 b, and a second ADC 356 b.

[0110] The cellular front-end system 455 of FIG7 is similar to the cellular front-end system 301 of FIG6 , except that the cellular front-end system 455 includes a cellular front-end module 465 (which includes a directional coupler 327 between an output of the power amplifier 324 and an input to the duplexer 323). As shown in FIG7 , the directional coupler 327 provides a sensed RF signal to a first switch 466. The first switch 466 also selectively receives a sensed RF signal from the directional coupler 313 via a second switch 467.

[0111] Therefore, in this embodiment, the first switch 466 selectively provides the sensed RF signal from the directional coupler 327 or the sensed RF signal from the directional coupler 313 to the first observation channel for processing and subsequent sampling by the baseband sampling circuit 361. Furthermore, the second switch 467 selectively provides the sensed RF signal from the directional coupler 313 to the second observation channel for processing and subsequent use by the transmission power control circuit 363.

[0112] Compared to the sensed RF signal from directional coupler 313, the sensed RF signal from directional coupler 327 has less group delay effects. Therefore, in this embodiment, the first digital observation data provided from cellular transceiver 451 to WiFi transceiver 304 includes additional observation information that can be used to enhance the accuracy of RF signal leakage compensation. Consequently, an enhanced reduction in RF signal leakage can be achieved.

[0113] In some implementations, low-pass filter 354a has a bandwidth that is wider than a channel bandwidth (e.g., three or more times the channel bandwidth). Implementing low-pass filter 354 in this manner can help provide ACLR samples, thereby helping to model spectral regrowth leakage in distortion / ACLR generation circuit 434 and / or allowing distortion / ACLR generation circuit 434 to be bypassed. In one embodiment, the channel bandwidth of low-pass filter 354a is controllable (e.g., digitally programmable by digital data received via a serial interface or bus) to provide configurability for discrete-time cancellation (e.g., the flexibility to widen the low-pass filter bandwidth to selectively accommodate ACLR sampling).

[0114] In some implementations, low-pass filter 404a has a bandwidth that is wider than a channel bandwidth (e.g., three or more times the channel bandwidth). Implementing low-pass filter 404a in this manner can help provide ACLR samples, thereby helping to model spectral regrowth leakage in distortion / ACLR generation circuit 384 and / or allowing distortion / ACLR generation circuit 384 to be bypassed. In one embodiment, the channel bandwidth of low-pass filter 404a is controllable.

[0115] FIG8 is a schematic diagram of an embodiment of a mobile device 800 with coexistence management. Mobile device 800 includes a digital processing system 801, a first transceiver 802, a second transceiver 812, a first front-end system 803, a second front-end system 813, a first antenna 804, a second antenna 814, a power management system 805, a memory 806, and a user interface 807.

[0116] The mobile device 800 may be configured to communicate using a wide variety of communication technologies, including but not limited to 2G, 3G, 4G (including LTE, LTE-Advanced, and LTE-Advanced Pro), 5G NR, WLAN (e.g., WiFi), WPAN (e.g., Bluetooth and ZigBee), WMAN (e.g., WiMax), and / or GPS technologies.

[0117] In the illustrated embodiment, digital processing circuit 801 includes a first baseband modem 821 and a second baseband modem 822. In certain implementations, first baseband modem 821 and second baseband modem 822 control communications associated with different types of wireless communications (e.g., cellular and WiFi). As shown in FIG8 , first baseband modem 821, first transceiver 802, and first front-end system 803 operate to transmit and receive RF signals using first antenna 804. Additionally, second baseband modem 822, second transceiver 812, and second front-end system 813 operate to transmit and receive RF signals using second antenna 814. While shown as an example with two antennas, mobile device 800 may include additional antennas, including, but not limited to, multiple antennas for cellular communications and / or multiple antennas for WiFi communications.

[0118] The first front-end system 803 operates to condition the RF signals transmitted by and / or received from the first antenna 804. Additionally, the second front-end system 804 operates to condition the RF signals transmitted by and / or received from the second antenna 814. The front-end system may provide a number of functionalities, including, but not limited to, amplifying signals for transmission, amplifying received signals, filtering signals, switching between different frequency bands, switching between different power modes, switching between transmit and receive modes, duplexing signals, multiplexing (e.g., duplexing or triplexing) signals, or some combination thereof.

[0119] In certain embodiments, mobile device 800 supports carrier aggregation, providing flexibility to increase peak data rates. Carrier aggregation can be used for both frequency division duplex (FDD) and time division duplex (TDD), and can be used to aggregate multiple carriers or frequency channels. Carrier aggregation includes contiguous aggregation, which aggregates contiguous carriers within the same operating frequency band. Carrier aggregation can also be non-contiguous, involving carriers separated by frequency within a common frequency band or different frequency bands.

[0120] First antenna 804 and second antenna 814 can include antenna elements implemented in a wide variety of ways. In some configurations, the antenna elements are arranged to form one or more antenna arrays. Examples of antenna elements include, but are not limited to, patch antennas, dipole antenna elements, ceramic resonators, stamped metal antennas, and / or laser direct structuring antennas.

[0121] In certain embodiments, mobile device 800 supports MIMO communication and / or switched diversity communication. For example, MIMO communication uses multiple antennas to transmit multiple data streams over a single radio frequency channel. Due to spatial multiplexing variations in the radio environment, MIMO communication benefits from higher signal-to-noise ratios, improved coding, and / or reduced signal interference. Switched diversity refers to communication in which a specific antenna is selected for operation at a given time. For example, a switch can be used to select a specific antenna from a group of antennas based on various factors, such as an observed bit error rate and / or a signal strength indicator.

[0122] In certain embodiments, mobile device 800 operates using beamforming. For example, first front-end system 803 and / or second front-end system 813 may include phase shifters with variable phases to provide beamforming and directionality for transmitting and / or receiving signals. For example, in the context of signal transmission, the phase of a transmission signal provided to an antenna array for transmission is controlled so that the radiated signals combine constructively and destructively to produce an aggregate transmission signal propagating in a given direction, exhibiting beamforming qualities with increased signal strength. In the context of signal reception, the phase is controlled so that when a signal arrives at the antenna array from a particular direction, more signal energy is received.

[0123] The first transceiver 802 includes one or more transmission channels 831, one or more reception channels 832, one or more observation channels 833, and a discrete time cancellation circuit 834. Furthermore, the second transceiver 812 includes one or more transmission channels 841, one or more reception channels 842, one or more observation channels 843, and a discrete time cancellation circuit 844.

[0124] 8 illustrates an embodiment of a mobile device implemented with coexistence management using discrete-time cancellation. Although one example of a mobile device is shown, the teachings herein are applicable to a wide range of coexistence management schemes.

[0125] Digital processing system 801 is coupled to user interface 807 to facilitate processing of various user input and output (I / O), such as voice and data. Digital processing system 801 provides digital representations of transmit signals to the transceiver, which processes these digital representations to generate RF signals for transmission. Digital processing system 801 also processes digital representations of received signals provided by the transceiver. As shown in FIG8 , digital processing system 801 is coupled to memory 806 to facilitate operation of mobile device 800.

[0126] The memory 806 may be used for a wide variety of purposes, such as storing data and / or instructions to facilitate the operation of the mobile device 800 and / or providing storage of user information.

[0127] Power management system 805 provides several power management functions for mobile device 800. In some embodiments, power management system 805 includes a PA supply control circuit that controls the supply voltage to power amplifiers in the front-end system. For example, power management system 805 can be configured to vary the supply voltage(s) provided to one or more power amplifiers to improve efficiency, such as power-added efficiency (PAE).

[0128] In some embodiments, the power management system 805 receives a battery voltage from a battery. The battery can be any suitable battery used in the mobile device 800, including, for example, a lithium-ion battery.

[0129] Figure 9A is a schematic diagram of one embodiment of a packaging module 900 with coexistence management. Figure 9B is a schematic diagram of a cross-section of the packaging module 900 of Figure 9A taken along line 9B-9B.

[0130] Package module 900 includes RF components 901, a semiconductor die 902, surface mount devices 903, wire bonds 908, a package substrate 920, and an encapsulation structure 940. Package substrate 920 includes pads 906 formed of conductors disposed therein. Furthermore, semiconductor die 902 includes pins or pads 904, and wire bonds 908 are used to connect pads 904 of die 902 to pads 906 of package substrate 920.

[0131] Semiconductor die 902 includes an RF communication system according to the teachings herein implemented with discrete-time cancellation 941. Although packaged module 900 illustrates one example of a module implemented according to the teachings herein, other implementations are possible.

[0132] As shown in FIG9B , package module 900 is shown to include a plurality of contact pads 932 disposed on the side of package module 900 opposite the side used to mount semiconductor die 902. Configuring package module 900 in this manner can facilitate connecting package module 900 to a circuit board, such as a telephone board for a wireless device. Exemplary contact pads 932 can be configured to provide radio frequency signals, bias signals, and / or power (e.g., a power supply voltage and ground) to semiconductor die 902. As shown in FIG9B , electrical connections between contact pads 932 and semiconductor die 902 can be facilitated by connections 933 extending through package substrate 920. Connections 933 can represent electrical paths formed through package substrate 920, such as connections associated with vias and conductors of a multilayer laminate package substrate.

[0133] In some embodiments, the package module 900 may also include one or more packaging structures for, for example, providing protection and / or facilitating handling. Such a packaging structure may include an overmold or encapsulation structure 940 formed over the package substrate 920 and the components and die(s) disposed thereon.

[0134] It will be understood that although package module 900 is described in the context of wire-bond based electrical connections, one or more features of the present invention may also be implemented in other packaging configurations, including, for example, flip-chip configurations. [application] []

[0135] Some of the embodiments described above have been used in conjunction with mobile devices. However, the principles and advantages of the embodiments can be applied to any other system or device requiring coexistence management. Examples of such RF communication systems include (but are not limited to) mobile phones, tablets, base stations, network access points, customer premises equipment (CPE), laptops, and wearable electronic devices. [in conclusion] []

[0136] Unless the context clearly requires otherwise, throughout this description and claims, the words "comprise," "comprising," and similar expressions should be construed in an inclusive sense, rather than an exclusive or exhaustive sense; that is, in the sense of "including, but not limited to." The word "coupled," as generally used herein, refers to two or more elements that can be connected directly or through one or more intermediate elements. Similarly, the word "connected," as generally used herein, refers to two or more elements that can be connected directly or through one or more intermediate elements. Furthermore, the words "herein," "above," "hereunder," and words of similar meaning, when used in this application, shall refer to this application as a whole and not to any particular portions of this application. Words in the above embodiments using the singular or plural number may also include the plural or singular number, respectively, where the context permits. The word "or" refers to a list of two or more items and includes all of the following interpretations of the word: any of the items in the list, all of the items in the list and any combination of the items in the list.

[0137] Furthermore, unless otherwise specifically stated or otherwise understood within the context in which they are used, conditional terms used herein, such as, inter alia, "may," "could," "might," "could," "for example," "for example," "such as," and the like, are generally intended to convey that some embodiments include and other embodiments do not include certain features, elements, and / or states. Thus, such conditional terms are generally not intended to imply that one or more embodiments in any way require features, elements, and / or states or that one or more embodiments necessarily include logic for determining, with or without author input or prompting, whether such features, elements, and / or states are included or implemented in any particular embodiment.

[0138] The above detailed description of the embodiments of the present invention is not intended to be exhaustive or to limit the invention to the precise form disclosed above. Although specific embodiments and examples of the present invention are described above for illustrative purposes, various equivalent modifications are possible within the scope of the present invention, as will be recognized by those skilled in the relevant art. For example, although procedures or blocks are presented in a given order, alternative embodiments may perform routines with steps in a different order or employ systems with blocks, and some procedures or blocks may be deleted, moved, added, subdivided, combined, and / or modified. Each of these procedures or blocks may be implemented in a variety of different ways. Furthermore, although procedures or blocks are sometimes shown as being executed in series, these procedures or blocks may alternatively be executed in parallel or may be executed at different times.

[0139] The teachings of the present invention provided herein can be applied to other systems, not necessarily the system described above. The elements and actions of the various embodiments described above can be combined to provide further embodiments.

[0140] Although certain embodiments of the present invention have been described, these embodiments have been presented by way of example only and are not intended to limit the scope of the invention. Indeed, the novel methods and systems described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions, and changes in the form of the methods and systems described herein may be made without departing from the spirit of the invention. The appended claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the invention.

[0141] 1: Base station 2a: Mobile devices 2b: Wireless Connectivity in Cars 2c: Another mobile device 2d: Wireless Connection Pedestrians 2e: Wireless connection parking light 2f: Another wirelessly connected car 3: WiFi access point 4: Laptop 51: First transceiver 52: Second transceiver 53: First front-end system 54: Second front-end system 55: First Antenna 56: Second Antenna 61: Transmission front-end circuit 62: Transmission front-end circuit 63: Receiving front-end circuit 64: Receiving front-end circuit 65: Antenna access circuit 66: Antenna access circuit 69: Radio Frequency (RF) Signal Leakage 70: Radio Frequency (RF) Communication System 80: Radio Frequency (RF) Communication System 81: Power Amplifier 82: Victim receiver 83: First Antenna 84: Second Antenna 90: Radio Frequency (RF) Communication System 101: First baseband modem 102: Second baseband modem 103: First transceiver 104: Second transceiver 105: First front-end system 106: Second front-end system 107: First Antenna 108: Second Antenna 110: Leakage correction circuit 111: Transmission channel 113: Observation Channel 114: Receiving channel 115: Transmission front-end circuit 117: Observe the front-end circuit 118: Receiving front-end circuit 119: Spectrum Regrowth Modeling Circuit 121: Directional Coupler 122: Antenna access circuit 131: Transmission Channel 132: Observation Channel 134: Receiving channel 135: Transmission front-end circuit 136: Observe the front-end circuit 138: Receiving front-end circuit 141:Directional Coupler 142: Antenna access circuit 150: Radio Frequency (RF) Communication System 151: Discrete-time cancellation circuit 152: Discrete-time cancellation circuit 153: First transceiver 159: Spectrum Regrowth Modeling Circuit 160: Radio Frequency (RF) Communication System 163: First transceiver 164: Second transceiver 165:First front-end system 166: Second front-end system 170: Radio Frequency (RF) Communication System 301:Cellular antenna 302: WiFi antenna 303:Cellular transceiver 304: WiFi transceiver 305:Cellular front-end system 306: WiFi front-end system 307: First transceiver to transceiver connection 308: Second transceiver to transceiver connection 311: Duplexer 312: Duplexer 313: Directional Coupler 314: Directional Coupler 315: Honeycomb front-end module 316: WiFi front-end module 317:Cellular signal path 318: WiFi signal path 321: Antenna switching module 322: Low Noise Amplifier and Switch (LNA / SW) 323: Duplexer 324:Power amplifier module 325: Control circuit 326: Transmission input switch 327: Directional Coupler 341: Transmit / Receive Switch 342: Power Amplifier 343:Low Noise Amplifier (LNA) 351a: Input Amplifier 351b: Second input amplifier 352a: Controllable attenuator 352b: Second controllable attenuator 353a: Down-Conversion Mixer 353b: Second down-conversion mixer 354a: Low-pass filter 354b: Second low-pass filter 355a: Post-filter amplifier 355b: Second post-filter amplifier 356a: Analog-to-Digital Converter (ADC) 356b: Second analog-to-digital converter (ADC) 359: Observe the local oscillator (LO) 360: Digital Baseband Circuit 361: Cellular transmission baseband sampling circuit 363: Cellular transmission power control circuit 371: Input Amplifier 373: Down-Conversion Mixer 374: Low-pass filter 375: Post-filter amplifier 376:Analog-to-Digital Converter (ADC) 379: Receiver local oscillator (LO) 381: Discrete-time cancellation circuit 382:Digital Receiver 383:Digital switch 384: Digital distortion / adjacent channel leakage rate (ACLR) generation circuit 385:Digital Mixer 401a: Input Amplifier 402a: Controllable attenuator 403a: Down-Conversion Mixer 404a: Low-pass filter 405a: Post-filter amplifier 406a: Analog-to-Digital Converter (ADC) 409: Observe the local oscillator (LO) 410: Digital baseband circuit 411: WiFi transmission baseband sampling circuit 421: Input Amplifier 423: Down-Conversion Mixer 424: Low-pass filter 425: Post-filter amplifier 426:Analog-to-Digital Converter (ADC) 429: Receive local oscillator (LO) 431: Discrete-time cancellation circuit 432:Digital Receiver 433: Digital switch 434: Digital Predistortion / Adjacent Channel Leakage Rate (ACLR) Generation Circuit 435:Digital Mixer 450: Radio Frequency (RF) Communication System 451:Cellular transceiver 455: Honeycomb front end 465: Honeycomb front-end module 466: First switch 467: Second switch 500: Radio Frequency (RF) Communication System 800: Mobile devices 801:Digital Processing System 802: First transceiver 803: First front-end system 804: First antenna 805: Power Management System 806: Memory 807: User Interface 812: Second transceiver 813: Second front-end system 814: Second Antenna 821: First baseband modem 822: Second baseband modem 831: Transmission Channel 832: Receiving channel 833: Observation Channel 834: Discrete-time cancellation circuit 841: Transmission Channel 842: Receiving channel 843: Observation Channel 844: Discrete-time cancellation circuit 900:Packaging module 901: RF components 902:Semiconductor grains 903: Surface Mount Devices 904: Pin / Pad 906:Padding 908: Wire bonding 920:Packaging substrate 932: Contact pad 933:Connect 940: Encapsulated structure 941: Discrete time cancellation

Claims

1. A mobile device comprising: A wireless local area network (WLAN) front-end system configured to generate an RF observation signal based on observing a WLAN transmit signal; a WLAN transceiver configured to process the RF observation signal to generate digital observation data; and a cellular transceiver configured to generate a digital baseband cellular receive signal based on processing an RF cellular receive signal, the cellular transceiver including a discrete-time cancellation circuit configured to compensate the digital baseband cellular receive signal for RF signal leakage based on the digital observation data, the discrete-time cancellation circuit including a regrowth modeling circuit configured to estimate an amount of aggressor spectral regeneration present in the RF cellular receive signal based on the digital observation data.

2. The mobile device of claim 2, wherein the spectrum regeneration modeling circuit is configured to estimate the amount of spectrum regeneration of the intruder based on the neighboring channel leakage rate modeled using predistortion.

3. The mobile device of claim 1, wherein the wireless local area network transceiver is configured to generate a digital observation signal based on the radio frequency observation signal, and the wireless local area network transceiver includes a baseband sampling circuit configured to sample the digital observation signal to generate the digital observation data.

4. The mobile device of claim 3, wherein the baseband sampling circuit generates the digital observation data to reflect a quantity of direct transmission leakage present in the wireless local area network transmission signal.

5. The mobile device of claim 1, wherein the wireless local area network front-end system includes a directional coupler configured to generate the radio frequency observation signal based on sensing the wireless local area network transmitted signal.

6. The mobile device of claim 5 further includes an antenna, the directional coupler being configured to generate the radio frequency observation signal based on a forward coupling path to the antenna.

7. The mobile device of claim 1 further includes a cellular front-end system configured to provide the radio frequency cellular receive signal to the cellular transceiver.

8. The mobile device of claim 7 further includes a first antenna coupled to one of the cellular front-end systems and a second antenna coupled to one of the wireless local area network front-end systems.

9. The mobile device of claim 1, wherein the wireless local area network front-end system is a WiFi front-end system and the wireless local area network transceiver is a WiFi transceiver.

10. A method for coexistence management in a mobile device, the method comprising: A wireless local area network (WLAN) front-end system is used to generate a radio frequency (RF) observation signal based on the observation of WLAN transmission signals. A wireless local area network transceiver is used to process the radio frequency observation signal to generate digital observation data; a cellular transceiver is used to process a radio frequency cellular receive signal to generate a digital baseband cellular receive signal; and a discrete-time cancellation circuit of the cellular transceiver is used to compensate the digital baseband cellular receive signal for radio frequency signal leakage based on the digital observation data, including estimating an amount of intrusive spectrum regeneration present in the radio frequency cellular receive signal based on the digital observation data.

11. The method of claim 10, wherein estimating the amount of intruder spectrum regeneration includes modeling a neighboring channel leakage rate using a predistortion model.

12. The method of claim 10, wherein processing the radio frequency observation signal further comprises generating a digital observation signal based on the radio frequency observation signal, and sampling the digital observation signal to generate the digital observation data.

13. The method of claim 12, further comprising generating the digital observation data to reflect a quantity of direct transmission leakage present in the wireless local area network transmission signal.

14. The method of claim 10, wherein generating the radio frequency observation signal includes using a directional coupler to sense the wireless local area network transmission signal.

15. The method of claim 10, further comprising providing the radio frequency cellular received signal from a cellular front-end system to the cellular transceiver.

16. A honeycomb transceiver, comprising: A cellular receiver channel configured to process radio frequency cellular receiver signals from a cellular front-end system to generate a digital cellular baseband receiver signal. An input is configured to receive digital wireless local area network (WLAN) observation data from a WLAN transceiver; and a discrete-time cancellation circuit is configured to compensate for radio frequency (RF) signal leakage in the digital cellular baseband received signal based on the WLAN observation data. The discrete-time cancellation circuit includes a spectrum regeneration modeling circuit configured to estimate an amount of intrusive spectrum regeneration present in the RF cellular received signal based on the WLAN observation data.

17. The cellular transceiver of claim 16, wherein the spectrum regeneration modeling circuit is configured to estimate the amount of spectrum regeneration of the intruder based on the neighboring channel leakage rate modeled using predistortion.

18. The cellular transceiver of claim 16, further comprising a cellular transmission channel configured to process a digital cellular baseband transmission signal to generate a radio frequency cellular transmission signal.

19. The cellular transceiver of claim 18 further includes a cellular observation channel configured to process an radio frequency cellular observation signal to generate digital cellular observation data.

20. The cellular transceiver of claim 19 further includes an output configured to provide the digital cellular observation data to the wireless local area network transceiver.

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