Method for reducing out-of-band radiation based on IA-PFT in GFDM system

Abstract

The invention discloses a method for reducing out-of-band radiation based on IA-PFT in a GFDM system for mainly solving the problem of sudden increase of out-of-band spectrum of signals in the existing GFDM system. The implementation scheme is as follows: 1, inputting a to-be-processed signal to a system transmitting end; 2, encoding the signal to obtain a binary bit stream; 3, converting the serial binary bit stream into a parallel signal sequence; 4, splitting the parallel signal sequence; 5, performing digital modulation and time domain windowing on to-be-processed time domain subcarriers;6, after interference elimination carriers are added to the to-be-processed frequency domain subcarriers, performing digital modulation and zero padding operation; 7, merging the signals processed inthe time domain and the frequency domain respectively; and 8, sending the merged signal. By adoption of the method disclosed by the invention, the out-of-band radiation of the signal transmitted by the GFDM system is effectively reduced, the problem of sudden increase of out-of-band spectrum when only the interference elimination carriers are added in the prior art is solved, the out-of-band radiation performance is excellent, and the high requirements of television blank spectrum for the out-of-band radiation of the modulation technology are met.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and further relates to a method for reducing out-of-band radiation by an interference suppression IA-PFT algorithm based on time-frequency domain separation processing in a generalized frequency division multiplexing GFDM system, which can be used to improve the performance of the generalized frequency division multiplexing system out-of-band radiation. Background technique [0002] In wireless communication technology, radio spectrum is a very scarce resource. With the increase of large-screen smart wireless services, the emergence of innovative services, and the increasing number of users, the scarcity of spectrum resources has become increasingly prominent. In order to solve this problem, regulatory agencies such as the Federal Communications Commission (FCC) of the United States and the Electronic Communications Committee of the European Postal Conference (ECC CEPT) have issue...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for suppressing out-of-band radiation based on an interference suppression algorithm based on time-frequency domain separation processing for the generalized frequency division multiplexing GFDM system, which can not only greatly reduce the generalized frequency division multiplexing The out-of-band spectrum leakage rate of the system can be used, and the problem of spectrum burst using the interference cancellation sub-carrier method can be solved, so as to obtain better out-of-band spectrum characteristics and meet the transmission requirements of TV white space

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