SOQPSK carrier synchronization method based on pilot frequency and coding joint aiding

Abstract

The invention discloses an SOQPSK carrier synchronization method based on pilot frequency and coding joint aiding. The SOQPSK carrier synchronization method based on pilot frequency and coding joint aiding mainly solves the problems that with an existing technology, the estimation complexity is high and the estimation range is small. The SOQPSK carrier synchronization method based on pilot frequency and coding joint aiding includes the implementation steps that first, rough estimation parameters and fine estimation parameters are determined; second, rough estimation is performed through the rough estimation parameters to obtain the rough estimation value f<co> of frequency offset and the rough estimation value fai<co> of phase offset; third, fine estimation is performed through the fine estimation parameters to obtain the fine estimation value f<in> of frequency offset and the fine estimation value fai<in> of phase offset; fourth, the final estimation value f=f<co>+f<in> of frequency offset is obtained through the rough estimation value f<co> of frequency offset and the fine estimation value f<in> of frequency offset; fifth, the final estimation value fai=fai<co>+fai<in> of phase offset is obtained through the rough estimation value fai<co> of phase offset and the fine estimation value fai<in> of phase offset. Through the method, the estimation normalized frequency offset range can be widened to the range from -0.5 to 0.5, the estimation complexity is low, and the SOQPSK carrier synchronization method based on pilot frequency and coding joint aiding can be used for carrier synchronization and wireless channel estimation of a wireless communication system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for obtaining carrier synchronization by using pilot frequency and code assistance in digital communication. The carrier synchronization method is suitable for a short frame burst communication system using Turbo product code TPC coding and shaped offset quadrature phase shift keying SOQPSK modulation, and can be used for military communication, satellite communication and telemetry communication. Background technique [0002] Short-frame burst communication systems are widely used in military communications, satellite communications, and telemetry communications, and the working channels in these fields are both power- and bandwidth-limited channels. Shaped offset quadrature phase shift keying (SOQPSK) signal is a spectrally efficient continuous phase modulation method, which has the characteristics of constant envelope and high power efficiency. It is one ...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the estimation range is large, and its normalized frequency offset estimation range is -0.5 to 0.5, but the complexity of the fine estimation of this method is high, and the amount of calculation is large

[0006] To sum up, the existing estimation methods cannot guarantee a large estimation range and low complexity at the same time, that is, when the estimation range is relatively large, the complexity is relatively high, and when the complexity is relatively low, the estimation range is relatively Small

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