Meethod of lowering multicarrier communication system signal peak uniform power ratio using cyclic matrix

A technology of multi-carrier communication and peak-to-average power ratio, which is applied in the field of communication and can solve problems such as system performance deterioration
CN1556598AInactive Publication Date: 2004-12-22TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2004-12-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for using circular matrix to reduce the signal peak-mean power ratio of multi-carrier communication system which belongs to communication technology field, the character lies in: at the transmitting end, through forming circular matrix, carries on weighting conversion to the multi-carrier modulator with a converter (the digital signal processing unit); at the receiving end, it carries on reverse conversion to the output signal of the multi-carrier demodulator with a reverse converter according to the reverse conversion rule correspondent to the transmitting end. The invention can reduce the peak-mean power ratio of the input signal effectively with lower calculation quantity and complexity in condition that does not provoke the system error byte rate performance loss, avoids the nonlinear loss when the power amplifier amplifies the signal.
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Description

technical field

[0001] The present invention belongs to the technical field of communication, and particularly relates to an effective method for controlling the peak-to-average power ratio of signals in a multi-carrier communication system including an orthogonal frequency division multiplexing communication system. Background technique

[0002] At present, Orthogonal Frequency Division Multiplexing (OFDM) technology is being applied to digital audio broadcasting, digital video broadcasting, wireless local area network data transmission and other fields as an effective broadband transmission technology. However, a major problem with this technique is the high peak-to-average power ratio of the OFDM signal, known as the peak-to-average power ratio (PAPR), which requires that the power amplifier of the transmitter must have sufficient linear dynamic range, thus increasing the The implementation complexity of the system. To reduce the PAPR of signals in OFDM communication sys...

Claims

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