Reordering module of fast Fourier transform (FFT) processor in 60GHz communication system

Abstract

The invention discloses a reordering module of a fast Fourier transform (FFT) processor in a 60GHz communication system. The reordering module of the FFT processor in the 60GHz communication system specifically comprises a first path selector, a random access memory (RAM) module, a second path selector and a control module, wherein an input end of the first path selector is used to input eight paths of concurrent FFT processor computation results, an input end of the RAM module is connected with an output end of the first path selector, an input end of the second path selector is connected with an output end of the RAM module, an output end of the second path selector is used to output the eight paths of the concurrent FFT processor computation results after the concurrent FFT processor computation results are sorted, and the control module is connected with the first path selector, the RAM module and the second path selector. The reordering module of the FFT processor in the 60GHz communication system is simple in processing procedure, and suitable for an eight path parallel flow line FFT processor under the IEEE802.11.ad protocol, and has one half of RAM consumption amount of a reordering module of the FFT processor in the prior art.

Description

technical field [0001] The invention belongs to the technical field of short-distance broadband communication, and in particular relates to the design of a reordering module of an FFT processor in a 60GHz communication system. Background technique [0002] IEEE802.11.ad is a standardized protocol for 60GHz short-distance ultra-wideband communication, which can support a transmission rate of several gigabits, and fully meets applications such as high-definition data stream download and high-definition video playback. The protocol has four physical layer modes, one of which uses OFDM (orthogonal frequency division multiplexing) modulation, and the other three use single carrier modulation. For OFDM modulation, FFT (Fast Fourier Transform) is one of its core calculations. For single carrier modulation, FFT is widely used in the channel equalization block. For most frequency-domain sampling FFTs, the input is in normal order, while the output is in reverse order. In order to m...

AI Technical Summary

Problems solved by technology

For an FFT processor with a large number of points, this reordering structure will consume too much RAM, which will significantly increase the area and power consumption in ASIC design

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