Signal transmission method based on binary phase shift keying modulation and orthogonal frequency division multiplexing

A phase shift keying and quadrature frequency division technology, applied in the field of communication, can solve the problem of inability to guarantee signal transmission performance, and achieve the effects of reducing demodulation error rate, improving reception signal-to-noise ratio, and low transmission error rate performance
CN109067686AInactive Publication Date: 2018-12-21ZHUHAI ZHONGHUI MICROELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHUHAI ZHONGHUI MICROELECTRONICS
Publication Date
2018-12-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

A signal transmission method based on binary phase shift keying modulation and orthogonal frequency division multiplexing technology. The conventional bpsk signals on the frequency domain subcarriersare grouped, each packet signal is transformed into a new packet signal containing two consecutive zero signals and six BPSK signals. The new packet signal is interleaved by a channel and then subjected to an inverse Fourier transform, and the generated time domain OFDM signal is added with a cyclic prefix and sent to a communication channel. After receiving the signal, firstly, the received signal is Fourier-transformed, then inverse channel interleaved, and then the signal is grouped and demodulated. Firstly, the positions of two zeros in each grouped signal are determined based on the energy of the signal. Then, the analysis results of the other six BPSK signals are obtained according to the grouped inverse mapping relation and the traditional OFDM signal processing mechanism. The invention improves the transmission mechanism and can obtain lower transmission error rate performance than the traditional BPSK + OFDM modulation method under the same information transmission rate.
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Description

technical field

[0001] The invention belongs to the technical field of communication, and in particular relates to a signal transmission method combining binary phase shift keying modulation technology and orthogonal frequency division multiplexing technology. Background technique

[0002] Orthogonal Frequency Division Multiplexing (OFDM for short) is one of Multi Carrier Modulation (MCM for short) technologies. OFDM is widely used in the field of broadband wireless communication because of its high spectrum utilization rate and strong anti-multipath ability. OFDM divides the channel into several orthogonal sub-channels, converts high-speed data signals into parallel low-speed sub-data streams, and then modulates them onto each sub-channel for transmission. Orthogonal signals are separated by correlation techniques at the receiving end, thereby reducing mutual interference between sub-channels. Since the signal bandwidth on each sub-channel is smaller than the bandwidth of...

Claims

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