Method for receiving anti-time domain impulse interference signal of coded OFDM system

A time-domain pulse and receiving method technology, applied in the field of communication, can solve problems such as real signal distortion, and achieve the effect of low bit error rate
CN109361633AActive Publication Date: 2019-02-19UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2019-02-19

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Abstract

The invention belongs to the technical field of communication, and particularly relates to a method for receiving an anti-time domain impulse interference signal of a coded OFDM system. The method directly performs an IFFT / FFT operation and noise reduction processing by using the characteristic that a high frequency zero-subcarrier is no data signal, which is simpler than the formula as shown in the description for calculating a channel, wherein D is a matrix of N x L<t>, and D(i,:)=F(n,:), 1<=i<=N, the LS estimation of a pilot symbols is as shown in the description. The occurrence ofsingular matrices is avoided. Since there is time domain impulse interference in the channel, there will be interference in the entire frequency band of a frequency domain. At this time, the desiredperformance cannot be obtained only by error correcting codes, and the method of scaling interference portions can reduce the interference, but the soft demodulation performance is still not ideal. According to the method, the interference is treated as equivalent noise together with noise, and the average power of the equivalent noise is calculated to replace the noise variance in the soft demodulation, thereby improving the system performance.
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Description

technical field

[0001] The invention belongs to the technical field of communication, and in particular relates to an anti-time-domain pulse interference receiving method of a coded OFDM system. Background technique

[0002] In recent years, people have higher and higher requirements for data traffic communication represented by the mobile Internet, and wireless communication technology is also developing in the direction of providing users with higher information transmission rates. In order to realize high-speed and highly reliable communication in a complex environment, the communication system needs to have the characteristics of high spectrum utilization and better anti-multipath ability. Just because of these characteristics, Orthogonal Frequency Division Multiplexing (OFDM) technology has become the solution of many wireless communication systems. In the current commercial 4G mobile communication solution, OFDM has become one of the key technologies in the physical l...

Claims

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