Joint estimation method for parameters in paired carrier system

Abstract

The invention belongs to the technical field of wireless communication and signal processing and discloses a joint estimation method for parameters in a paired carrier system. A likelihood function isconstructed according to received time-frequency overlapped signals, and logarithms at two sides of the constructed likelihood function are taken to obtain a required function. Signals in a PCMA system have independent and unrelated property, so through utilization of the property among the signals in the PCMA system and through combination of the function, derivation is carried out on required parameters, a joint equation set is established, the parameters of the signals in the PCMA system are calculated according to the constructed joint equation set, and the parameters of local signals inthe PCMA system can be estimated. According to the method, under a low signal to noise ratio condition, the parameters of the signals in the PCMA system have good estimation performance. The performance is relatively stable under different signal to noise ratio conditions. Compared with a traditional method, the method has the advantage of being relatively close to the theoretical bound.

Description

technical field [0001] The invention belongs to the technical field of utilizing wireless communication and signal processing, and in particular relates to a method for jointly estimating parameters in a paired carrier system. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: in the field of modern wireless communication, with the rapid development of satellite communication technology and the continuous increase of communication traffic, the possibility of receiving multiple signal components in the same frequency band has greatly increased. These signal components are aliased in both the time domain and the frequency domain, making spectrum resources increasingly tight. Paired carrier multiple access multiplexing, namely paired carrier multiple access technology (PCMA), is a new technology used to improve satellite communication capacity and an effective technology to solve the problem of spectrum resource shorta...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problem existing in the existing technology is: because in the PCMA system, the signal belongs to time-frequency overlapping signal, in the existing literature, only a single parameter of the signal in the PCMA system is estimated, so it is difficult to estimate the PCMA system at the same time Aiming at this problem, the present invention proposes a joint estimation method of parameters in a paired carrier system in the PCMA system, so as to solve the above-mentioned problem

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