Modulation partitioning and transmission via multiple antennas for enhanced transmit power capability
Apparatus and methods for modulation partition and transmission via multiple antennas for enhanced transmit power capability are provided herein. In certain embodiments, an RF communication system includes a transceiver that generates a first RF signal and a second RF signal corresponding to partitions of a modulated RF signal. For example, the first RF signal and the second RF signal can be associated with different RB allocations of one or more channels of a frequency band. The RF communication system further includes a first transmit chain that processes the first RF signal to generate a first RF output signal for transmission on a first antenna, and a second transmit chain that processes the second RF signal to generate a second RF output signal for transmission on a second antenna.
1. A mobile device comprising:
a transceiver that is configured to partition a transmit signal of a radio frequency band into at least first and second sub-bands when modulation is non-contiguous and direct the first sub-band to a first front-end module and the second sub-band to a second front-end module, the transceiver further configured to direct a non-partitioned transmit signal to the first front-end module when the modulation is contiguous;
the first front-end module is electrically connected to a first antenna, the first front-end module having a first signal transmit path and a first signal receive path with a first receive intermodulation duplexer connected to the first signal receive path and to at least a first time division duplexing low noise amplifier (TDD LNA) and a first frequency division duplexing low noise amplifier (FDD LNA), the first receive intermodulation duplexer processes the second sub-band and passes a first back-injected signal to the first FDD LNA but not the first TDD LNA; and
the second front-end module electrically connected to a second antenna, the second front-end module having a second signal transmit path and a second signal receive path with a second receive intermodulation duplexer connected to a second FDD LNA but not a second TDD LNA, the second receive intermodulation duplexer processes the first sub-band and passes a second back-injected signal to the second FDD LNA.
2. The mobile device of claim 1 wherein the radio frequency band is Band 71 .
3. The mobile device of claim 1 further comprising a first power amplifier configured to amplify a first radio frequency signal associated with the radio frequency band, and a second power amplifier configured to amplify a second radio frequency signal associated with the radio frequency band.
4. The mobile device of claim 3 wherein the first radio frequency signal and the second radio frequency signal correspond to non-contiguous resource block allocations in a common channel of the radio frequency band.
5. The mobile device of claim 3 wherein the first radio frequency signal corresponds to a first resource block allocation in a first channel of the radio frequency band, and the second radio frequency signal corresponds to a second resource block allocation in a second channel of the radio frequency band.
6. The mobile device of claim 5 wherein the first channel and the second channel are non-contiguous in frequency and the first and second resource block allocations are separated in frequency.
7. The mobile device of claim 6 wherein the first and second resource block allocations are separated in frequency by less than about 35 megahertz.
8. The mobile device of claim 1 wherein the first and second sub-bands have partially overlapping frequency ranges.
9. The mobile device of claim 1 wherein the first and second sub-bands are non-contiguous.
10. The mobile device of claim 1 further comprising phase shifters to provide beam formation and directivity for the first and second signal transmit paths.
11. A radio frequency communication system comprising:
a transceiver that partitions a transmit signal of a radio frequency band into at least a first sub-band and a second sub-band when modulation is non-contiguous and direct the first sub-band to a first front-end module and the second sub-band to a second front end module, the transceiver further configured to direct a non-partitioned transmit signal to the first front-end module when the modulation is contiguous;
a first signal receive path connected to a first intermodulation duplexer that is connected to at least a first time divisional duplexing low noise amplifier (TDD LNA) and a first frequency division duplexing low noise amplifier (FDD LNA), The first intermodulation duplexer processes the second sub-band and passes a first back-injected signal to the first FDD LNA but not the first TDD LNA; and
a second signal receive path connected to a second intermodulation duplexer that is connected to at least a second FDD LAN but not a second TDD LNA, the second intermodulation duplexer processes the first sub-band and passes a second back-injected signal to the second FDD LNA.
12. The radio frequency communication system of claim 11 wherein the radio frequency band is Band 71 .
13. The radio frequency communication system of claim 11 further comprising a first power amplifier configured to amplify a first radio frequency signal associated with the radio frequency band, and a second power amplifier configured to amplify a second radio frequency signal associated with the radio frequency band.
14. The radio frequency communication system of claim 13 wherein the first radio frequency signal and the second radio frequency signal correspond to non-contiguous resource block allocations in a common channel of the radio frequency band.
15. The radio frequency communication system of claim 13 wherein the first radio frequency signal corresponds to a first resource block allocation in a first channel of the radio frequency band, and the second radio frequency signal corresponds to a second resource block allocation in a second channel of the radio frequency band.
16. The radio frequency communication system of claim 15 wherein the first channel and the second channel are non-contiguous in frequency and the first and second resource block allocations are separated in frequency.
17. The radio frequency communication system of claim 16 wherein the first and second resource block allocations are separated in frequency by less than about 35 megahertz.
18. The radio frequency communication system of claim 11 wherein the first and second sub-bands have partially overlapping frequency ranges.
19. The radio frequency communication system of claim 11 wherein sub-bands are non-contiguous.
20. The radio frequency communication system of claim 11 further comprising phase shifters to provide beam formation and directivity for the first and second signal transmit paths.