A Parallel Processing Interleaver Applied in OFDM Transmission System

Abstract

The invention discloses a parallel processing interleaver applied in an orthogonal frequency division multiplexing transmission system. The orthogonal frequency division multiplexing transmission system comprises a transmitter; the transmitter processes coding data through a parallel interleaver; the parallel processing interleaver comprises a first and third level interleave processing modules and a ping-pong RAM memory cell; the memory cell simultaneously writes and reads the data through a ping-pong operation; in the ping-pong RAM memory cell, each ping-pong memory comprises two groups; each group is a memory structure with 6 RAMs; the first and third level interleave processing module comprises a data address generation unit for generating read and write addresses; the interleaver also comprises a second level interleave processing module for carrying out interleave processing in a QAM modulation mode; the second level interleave processing module changes the sequence of the input data according to the control of a counter; a main control module is connected to the data address generation unit, the ping-pong RAM memory cell and the second level interleave processing module; and the data address generation unit is also connected with the ping-pong RAM memory cell.

Description

technical field [0001] The present invention relates to the field of communication coding, and more specifically, relates to a parallel processing interleaver applied to an orthogonal frequency division multiplexing transmission system. Background technique [0002] With the development of communication technology and digital signal processing technology, Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology has become the mainstream technology of mobile communication. Now the fourth generation mobile network communication technology (4G) and wireless local area network (WLAN) , Wireless Local Area Network) are all OFDM technology. With the gradual popularization of smart mobile terminals and the demand for high-bandwidth applications such as online high-definition video playback, people have higher and higher data rate requirements for wireless communication, so communication technology needs to continue to develop. At pre...

AI Technical Summary

Problems solved by technology

However, most interleavers currently use the address generation method, which is to intelligently generate the required address according to the formula. However, many of the address generation methods use serial input and serial output, and cannot output in parallel or serially according to the characteristics of input and output. , and at high data throughput rates, a higher operating clock is required

This is often very bad for low power designs

Images