A method and device for signal processing

Abstract

The embodiment of the invention provides a signal processing method and device. The method comprises the steps that the signals transmitted by a terminal through the physical uplink shared channel PUSCH of the current subframe are received; when the terminal switches to the physical uplink control channel PUCCH of the next subframe from the physical uplink shared channel PUSCH of the current subframe, forward taking operation is performed on the signals; discrete Fourier transform is performed on the signals completing forward taking operation so as to obtain the discrete Fourier transform result; and the signals are compiled according to the discrete Fourier transform result. Data truncation can be avoided so that the complete data information of the signals can be acquired by the base station, the block error ratio of terminal signal transmitting can be reduced, the great receiving performance of the base station side can be guaranteed and the transmission efficiency of the signals can be enhanced.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a signal processing method and a signal processing device. Background technique [0002] LTE (Long Term Evolution, long-term evolution) is a development trend of future wireless communications. According to different duplex modes, the LTE system can be divided into two technologies: FDD-LTE (Frequency Division Duplexing) and TDD-LTE (Time Division Duplexing). [0003] In the LTE system, uplink control information is used to carry uplink control signaling, such as measurement reporting, scheduling requests, confirmation messages, etc., and is mainly sent on the PUCCH (Physical Uplink Control CHannel, Physical Uplink Control Channel), while uplink data information is mainly The transmission is performed on a PUSCH (Physical Uplink Shared Channel, physical uplink shared channel). For the FDD-LTE system, when the terminal switches between the PUSCH channel a...

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Problems solved by technology

Power amplifier selection is an operation performed on analog signals, and the effective time point cannot be precisely controlled

Usually, when the terminal switches channels, the power on the PUSCH channel in the previous subframe is relatively high, and the power on the PUCCH channel in the next subframe is small. When selecting power amplifiers, in order to ensure the integrity of the initial waveform of the next subframe, The gear selection operation will be performed in advance, causing the signal waveform on the PUSCH channel of the previous subframe to be interrupted before it is completely transmitted, and transmitted at low power

This will easily cause a decoding error in the last OFDM symbol of the signal on the PUSCH channel before channel switching, affecting uplink performance

In addition to switching between the PUSCH channel and the PUCCH channel, if the frequency band resources (the number of PRBs) occupied by the two adjacent service scheduling of the user are quite different, the problem that the OFDM symbol at the end of the previous subframe may be truncated may also occur.

Similarly, in a TDD-LTE system, if multiple uplink subframes are configured, or there is a regular subframe SRS signal (Sounding Reference Signal, channel sounding reference signal) and the bandwidth of the SRS signal is quite different from the bandwidth of the service signal, the There is a problem that the end OFDM symbol is truncated, which affects the uplink performance

[0004] In the prior art, the way to deal with the above problem is that before the base station performs discrete Fourier transform on the received uplink signal, it will remove the cyclic prefix of each OFDM symbol in the signal, and only keep the valid data part, but This method is equivalent to introducing distortion at the entrance of signal processing, which will still further affect the subsequent signal processing (such as demodulation, compilation, etc.) process, thereby affecting the uplink performance

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