Block transmission system frequency field demodulation device based on filter set and its method

A block transmission and filter bank technology, applied in multi-carrier systems, multi-frequency code systems, etc., can solve the problems of high structural complexity and high computational complexity, and achieve the effect of low implementation complexity

Active Publication Date: 2007-12-19
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI +1
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the need for single-carrier frequency domain equalization and filter bank time-domain implementation in the existing receiving scheme of the filter bank-based frequency division multiple access system (DFT-S-GMC). Perform two Fourier transforms with larger points, and its computational complexity is higher; and when the multi-subband filte

Method used

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  • Block transmission system frequency field demodulation device based on filter set and its method
  • Block transmission system frequency field demodulation device based on filter set and its method
  • Block transmission system frequency field demodulation device based on filter set and its method

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Experimental program
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Example Embodiment

[0046] Example:

[0047] System Simulation and Results

[0048] (1) System simulation parameters

[0049] System sampling frequency 7.68MHz

[0050] Total number of subbands (M): 28

[0051] Number of occupied subbands (K): 1 subband / 6 subbands

[0052] Prototype Filter: Root Raised Cosine

[0053] Prototype filter length (L): 392

[0054] Filter Upsampling Rate (N): 32

[0055] Subband mapping method: centralized mapping (only for 6 subbands)

[0056] Coding method / code rate: Turbo(1 / 2)

[0057] Modulation method: QPSK

[0058] Antenna configuration: 1 send and 1 receive

[0059] Channel model: PB(3km / h)

[0060] Equalization algorithm: MMSE frequency domain equalization

[0061] Frequency domain equalization points Q: 512

[0062] The number of waveform symbols multiplexed per data block D: 16

[0063] Comparing Simulation Systems: Frequency Domain Demodulation Methods and Time Domain Demodulation Methods

[0064] (2) Simulation results

[0065] It can be seen...

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Abstract

This invention relates to a frequency domain demodulation device and a method based on a blocking transmission system of a filter set, which first of all makes DFT transformation of Q=DxN point to convert time domain data to a those of frequency domain, then caries out single dot or MMMSE balance to each equivalent sub-carrier based on its position corresponding to the frequency spectrum and estimated channel frequency response then caries out matched filter to the position, energy collection and frequency offset compensation operation and applies multiple D IFFT to convert the frequency domain data of the sub-band to those of time domain and finally a K dot inverse orthogonal transformation device carries out K dot inverse orthogonal transformation to input symbol sequence output by the K parallel-serial converting device to finish demodulation of transmitted signals of the filter set.

Description

technical field [0001] The invention relates to a broadband mobile communication, a frequency division multiple access system (FDMA) of a filter bank in mobile communication and digital communication. Background technique [0002] In recent years, wireless communication systems have developed rapidly towards broadband; along with this development trend, wireless communication systems occupy higher and higher bandwidths, higher transmission rates, and higher spectral efficiency requirements. In the broadband wireless mobile communication system and the broadband wireless access network, multiple users are required to access at the same time, so multiple access technology is required. There are three main types of multiple access technologies commonly used: frequency division multiple access, time division multiple access, and code division multiple access. Frequency division multiple access technology is to allocate user information to carrier channels of different frequenci...

Claims

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Application Information

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Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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