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Quick implement method of multicarrier filter bank

A filter bank and multi-carrier technology, which is applied in the field of satellite communication systems, can solve the problem that the filter bank cannot be effectively realized, and achieve the effect of convenient unit module multiplexing

Inactive Publication Date: 2004-09-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When N>M, it is called a redundant filter bank, and the DFT polyphase structure cannot effectively realize the filter bank

Method used

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  • Quick implement method of multicarrier filter bank
  • Quick implement method of multicarrier filter bank
  • Quick implement method of multicarrier filter bank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Set M=16, N=18, take L=217 (K=18), take 16 subbands, subband width 1.28MHz, K=18 as an example:

[0041] (1) Rapid realization device of synthetic filter bank

[0042]1) The IFFT unit is a 16-point IFFT module with serial input and serial output. Each beat inputs 12 complex data (24 data) of 12 sub-bands. The data rate is 30.72Msps, the word length is 12bits, and the internal coefficient word length 10bits, the output data rate is 23.04Msps, each beat, the first 16 clocks perform IFFT operation, output 16 complex data, and the last 2 clocks output 2 "0", the word length is 16bits.

[0043] 2) The SRAM unit is an 18-word SRAM with a word length of 10 bits. The first 16 words are prototype filter coefficients, and the last 2 words are "0".

[0044] 3) The multiplier unit is a 16bits×10bits multiplier, which outputs 16bits and multiplexes twice to complete the multiplication of complex data and real coefficients. The operation clock is 46.08MHz.

[0045] 4) The adder uni...

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PUM

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Abstract

The invention is a kind of quick realizing device for multi-carrier filter group, which can be used in wideband wireless mobile communication system, satellite communication system, and new generation of wireless local area network. The synthesizing filter group in the device is made up of an inverse fast Fourier transition, fourteen static memory units, fourteen multiplexers, thirteen adders, thirteen double-port static memory address controllers; the transmitting signal connects with the input end of the inverse fast Fourier transition, the output end of inverse Fourier transition connects to the input end of the fourteen multiplexes, the output end of multiplexers and the output end of back double-port static memory units are connected to the input end of adders, the output ends of adders are connected to the output end of former grade double-port static memory units, the output of the forefront adder is the output of synthesizing filter group.

Description

technical field [0001] The invention is a device that can be used in broadband wireless mobile communication system, satellite communication system and new generation wireless local area network. It belongs to the technical field of multi-carrier digital communication. Background technique [0002] With the successful application of OFDM (Orthogonal Frequency Division Multiplexing) technology in ADSL (Asymmetric Digital Subscriber Line) and HDTV (High Definition Digital Television), multi-carrier technology has become the mainstream technology in broadband digital communication systems. Synthesis / analysis filter bank is a necessary means to implement multi-carrier technology. Multi-carrier filter bank has the advantage of more flexible sub-band control than OFDM, and is especially suitable for broadband wireless mobile communication systems. Multicarrier filter banks such as figure 1 As shown, it consists of a synthesis filter bank (on the left) and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02H04B1/40
Inventor 黄清高西奇尤肖虎
Owner SOUTHEAST UNIV
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