Signal processing method and device

Abstract

The invention provides a signal processing method and device. The method comprises the step that in frequency domain resources of a comb tooth structure, reference signals mapped on the frequency domain resources of different comb teeth can be generated by different sequences. That is to say, the reference signals on different frequency domain resources can be generated by adopting different sequences, so that the performance of the reference signals transmitted on the frequency domain resources of the whole comb tooth structure is improved.

Description

technical field [0001] The present application relates to a communication system, and more specifically, to a signal processing method and device. Background technique [0002] In a long term evolution (long term evolution, LTE) system, a physical uplink shared channel (physical uplink shared channel, PUSCH) and a PUCCH use a demodulation reference signal (demodulation reference signal, DMRS) for channel estimation, thereby performing signal demodulation. In the LTE system, the base sequence of the uplink DMRS can be directly mapped to resource elements without any coding process. In LTE, the uplink DMRS reference sequence is defined as the cyclic shift of the basic sequence, and the basic sequence of the uplink DMRS is obtained by cyclic expansion of Zadoff-Chu sequence (ZC sequence). The ZC sequence is a sequence that satisfies the property of a constant envelope zero autocorrelation (CAZAC) sequence. [0003] In the new radio access technology (new radio access technolo...

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Problems solved by technology

[0004] However, if the uplink DMRS uses the ZC sequence, the peak-to-average power ratio (PAPR) of the DMRS will be higher than the PAPR of the corresponding uplink transmission signal, resulting in DMRS out-of-band spurious emission and in-band signal loss, affecting Channel estimation performance, or lead to limited uplink coverage

In addition, when the uplink DFT-s-OFDM and DMRS waveforms use π / 2, BPSK modulation, and filters are used, if the uplink DFT-s-OFDM and DMRS waveforms use Gold sequence-based sequences or CGS, if the Appropriate screening will lead to poor frequency flatness of the sequence, which is not conducive to channel estimation

If the uplink DFT-s-OFDM, the DMRS waveform uses the ZC sequence, the peak-to-average power ratio (PAPR) of the DMRS will be higher than the PAPR of the transmitted data, resulting in out-of-band spurious emission of the pilot signal and in-band Signal loss, affecting channel estimation performance, or causing limited uplink coverage

[0005] That is to say, using the existing DMRS sequence cannot satisfy the current communication application environment

In addition, the sequence used by the existing reference signal (for example, DMRS) used for PDSCH cannot meet the current communication application environment using PUSCH to send signals.

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