Transmit power reduction for a wireless device with multiple transmit signal paths
First Claim
1. A wireless device comprising:
- a first transmit signal path operable to generate a first radio frequency (RF) output signal for transmission from a first antenna;
a second transmit signal path operable to generate a second RF output signal for transmission from a second antenna, the first and second antennas being transmit antennas and being de-correlated with respect to each other; and
a controller operable to selectively enable the first transmit signal path, the second transmit signal path, or both the first and second transmit signal paths to achieve a higher received signal level at a receiver, wherein the first and second transmit signal paths are selectively disabled based on transmit power control (TPC) commands received by the wireless device.
1 Assignment
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Accused Products
Abstract
A wireless device is equipped with multiple (e.g., two) antennas, which may be of different designs. Each antenna interacts with the wireless environment in a different manner and achieves different scattering effect. The wireless device has one transmit signal path for each antenna. Each transmit signal path generates an RF output signal for transmission from the associated antenna. The wireless device controls the operation of one or more transmit signal paths to achieve a larger received signal level at a receiving base station. The wireless device may (1) autonomously adjust the transmit signal path(s) without relying on any feedback from the base station or (2) adjust the transmit signal path(s) based on transmit power control (TPC) commands received from the base station. The wireless device may selectively enable and disable each transmit signal path, vary the phase and/or gain of each transmit signal path, and so on.
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Citations
36 Claims
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1. A wireless device comprising:
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a first transmit signal path operable to generate a first radio frequency (RF) output signal for transmission from a first antenna; a second transmit signal path operable to generate a second RF output signal for transmission from a second antenna, the first and second antennas being transmit antennas and being de-correlated with respect to each other; and a controller operable to selectively enable the first transmit signal path, the second transmit signal path, or both the first and second transmit signal paths to achieve a higher received signal level at a receiver, wherein the first and second transmit signal paths are selectively disabled based on transmit power control (TPC) commands received by the wireless device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of transmitting data, comprising:
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generating a first radio frequency (RF) output signal for transmission from a first antenna at a wireless device; generating a second RF output signal for transmission from a second antenna, the first and second antennas being transmit antennas and being de-correlated with respect to each other; selectively enabling the generation of the first RF output signal, the second RF output signal, or both the first and second RF output signals to achieve a higher received signal level at a receiver, wherein the first and second RF output signals are selectively disabled based on transmit power control (TPC) commands received by the wireless device. - View Dependent Claims (12, 13)
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14. A wireless apparatus, comprising:
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means for generating a first radio frequency (RF) output signal for transmission from a first antenna; means for generating a second RF output signal for transmission from a second antenna, the first and second antennas being transmit antennas and being de-correlated with respect to each other; and means for selectively enabling the means for generating the first RF output signal, the means for generating the second RF output signal, or both the means for generating the first RF output signal and the means for generating the second RF output signal to achieve a higher received signal level at a receiver, wherein the first and second RF output signals are selectively disabled based on transmit power control (TPC) commands received by the wireless device.
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15. A wireless device comprising:
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a first transmit signal path operable to generate a first radio frequency (RF) output signal for transmission from a first antenna; a second transmit signal path operable to generate a second RF output signal for transmission from a second antenna, the first and second antennas being transmit antennas and being de-correlated with respect to each other; and a controller operable to autonomously adjust operation of the first transmit signal path, the second transmit signal path, or both the first and second transmit signal paths without feedback from a receiver receiving the first and second RF output signals, wherein the first and second transmit signal paths are selectively disabled based on transmit power control (TPC) commands received by the wireless device. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A wireless device comprising:
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a first transmit signal path operable to generate a first radio frequency (RF) output signal; a second transmit signal path operable to generate a second RF output signal; a first antenna for transmitting the first RF output signal; and a second antenna for transmitting the second RF output signal, the first and second antennas being transmit antennas and being de-correlated with respect to each other, wherein the first and second transmit signal paths are selectively disabled based on transmit power control (TPC) commands received by the wireless device. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A wireless device comprising:
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a first transmit signal path operable to generate a first radio frequency (RF) output signal having a first power level; a second transmit signal path operable to generate a second RF output signal having a second power level that is lower than the first power level; a first antenna for transmitting the first RF output signal; and a second antenna for transmitting the second RF output signal, the first and second antennas being transmit antennas and being de-correlated with respect to each other, wherein the first and second transmit signal paths are selectively disabled based on transmit power control (TPC) commands received by the wireless device. - View Dependent Claims (29, 30, 31, 32)
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33. An integrated circuit for a wireless device, comprising:
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a modulator operable to receive baseband signals and generate a modulated signal; a first amplifier operable to amplify the modulated signal and provide a first radio frequency (RF) modulated signal; and a second amplifier operable to amplify the modulated signal and provide a second RF modulated signal, wherein the first and second RF modulated signals are designated for respective transmission from first and second antennas de-correlated with respect to each other, and wherein operation of the first amplifier, the second amplifier, or both the first and second amplifiers is controlled to achieve a higher received signal level at a receiver, wherein the first and second RF modulated signals are selectively disabled based on transmit power control (TPC) commands received by the wireless device. - View Dependent Claims (34, 35, 36)
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Specification