Method for decreasing peak equilibrium ratio and orthogonal frequency division multiplexing system

A technology of orthogonal frequency division and peak-to-average ratio, which is applied in the field of reducing peak-to-average ratio based on orthogonal frequency division multiplexing technology, can solve problems such as high complexity, high algorithm complexity, and increased search times, so as to reduce complexity degree of effect
CN1984110AInactive Publication Date: 2007-06-20HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2007-06-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to a method to reduce the peak-to-average and orthogonal frequency division multisystem with low peak-to-average, the core of the invention is: before anti-Fourier IFFT transform, the transmitter completely removes or retains part of the initial phase of modulated transmit sequence, and add the transfer function; the receiver removes the transfer function obtained after fast Fourier FFT transform in the frequency domain sequences, carry through the initial phase processing to the frequency domain sequences removed the transfer function, then resume to this transmit sequence. The invention only does N times complex multiplication when adding the transfer function, so it can reduce the implementation complexity of the transmitter and receiver under the premise to effectively reduce peak-to-average. In addition, through the use of this method of keeping part initial phase of transmit sequence by multiply initial phase of transmit sequence with phase factor, the source do not need to send any redundant information like side band information, therefore further lower the implementation complexity of transmitter and receiver.
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Description

technical field

[0001] The present invention relates to the field of wireless communication, in particular to a technology for reducing peak-to-average ratio based on Orthogonal Frequency Division Multiplexing (OFDM) technology. Background technique

[0002] With the development of mobile communication services, various multimedia services continue to emerge. OFDM technology has been used in digital audio broadcasting (DAB), digital video broadcasting (DVB), asymmetric digital subscriber line (ADSL), and networks based on IEEE802.11 and 802.16 standards. It has been applied in wireless local area network (WLAN) and has become the main candidate technology of 4G.

[0003] OFDM technology is a multi-carrier broadband digital modulation technology. It divides the data stream into several sub-bit streams, so that each sub-data stream has a lower transmission bit rate, and uses these data streams to modulate several orthogonal carrier waves. The data transmission rate of each m...

Claims

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