Method of transmitting signals, sending end and receiving end

Abstract

The present application discloses a method for transmitting signals, which includes mapping a first sequence including M elements and a second sequence including M elements to M subcarriers distributed at equal intervals, and the M subcarriers are the same The subcarriers on the time domain symbol, the first sequence and the second sequence are code division orthogonal, the first sequence a 0 ,a 1 ,...,a M‑1 is a third sequence c of length K 0 ,c 1 ,...,c K‑1 obtained by extension, the second sequence b 0 ,b 1 ,...,b M‑1 is the fourth sequence d of length K 0 , d 1 ,...,d K‑1 Expanded, M=p×K, i is a variable, and the value of i is 0,1,...,M-1, u and v are respectively one of 0,1,...,p-1 value, and v is not equal to u; generate a transmission signal according to the elements on the M subcarriers; and transmit the transmission signal. The signal transmission method of the present application constructs two code-division orthogonal sequences through periodic repetition and phase rotation, so that when at least two signals are transmitted in one time-domain symbol, the PAPR of signal transmission can be guaranteed to be low.

Description

technical field [0001] The present application relates to the communication field, and more specifically, relates to a signal transmission method, a sending end and a receiving end. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used due to its strong anti-multipath interference ability, simple discrete Fourier transform implementation, and favorable multi-antenna transmission technology. Downlink signal transmission in LTE system. [0003] Because the OFDM technology is based on a multi-carrier system, its peak-to-average power ratio (Peak to Average Power Ratio, PAPR) is high, and the requirements on the linear power amplifier of the transmitter are very high. Since the base station side does not have high requirements for cost control and can use a transmitter with good power amplifier linearity, OFDM technology is usually used for downlink transmission. However, UE has limited transmit power and is sensitive to cost...

AI Technical Summary

Problems solved by technology

[0011] In the above example, since the signal sent on one symbol is a superimposed signal of multiple phase-rotated sequences of a base sequence, the composite signal S(n) is no longer an SC-FDMA signal. Therefore, compared with SC-FDMA signal, PAPR will increase, resulting in a decrease in power utilization and affecting uplink performance

Images