System and method for communicating data symbols via wireless doubly-selective channels

A data symbol, selective technology, used in radio transmission systems, digital transmission systems, transmission systems, etc., can solve problems such as undesired

Active Publication Date: 2017-12-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the transmission of isochronous packets results in additional communication overhead, which is undesirable or even unacceptable for many applications

Method used

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  • System and method for communicating data symbols via wireless doubly-selective channels
  • System and method for communicating data symbols via wireless doubly-selective channels
  • System and method for communicating data symbols via wireless doubly-selective channels

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Embodiment Construction

[0049] System and method overview

[0050] figure 1 A block diagram illustrating a method and system for wireless communication between a transmitter 100 and a receiver 105 via a multiple-input multiple-output (MIMO) dual-selective channel 150 according to some embodiments of the invention, MIMO dual-select Sexual channel 150 is subject to time-varying fading and multipath delays for transceivers equipped with multiple antennas. Time-varying fading leads to time-selective channels with inter-carrier interference (ICI), while multipath delay leads to frequency-selective channels with inter-symbol interference (ISI). Some embodiments of the invention can transmit high-speed data even for situations where the transceiver is moving at extremely fast speeds (eg, for cellular phones carried on bullet trains and airplanes). Furthermore, an embodiment of the present invention may enable non-coherent transmission that does not rely on any pilot symbols or training sequences for estim...

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Abstract

A method for decoding data symbols modulated with a corresponding codeword from a constellation set of codewords expands the constellation set of codewords with a set of basis functions to produce a basis-expanded constellation set and projects projecting a received modulated data symbol onto orthogonal complements of the basis expanded constellation set to obtain a set of distance metric of a generalized likelihood ratio test (GLRT) for each codeword of the constellation set. The set of basis functions includes a Fourier exponential basis function in a frequency domain, a Legendre polynomial basis function in a time domain, and a Fourier-Legendre product basis function in the frequency domain. The method selects a codeword corresponding to a minimal distance metric or a maximal correlation metric and decodes the data symbol from the received modulated data symbol using the codeword.

Description

technical field [0001] The present invention relates generally to digital communications, and more particularly to the transmission of high speed data via wireless dual selective channels. Background technique [0002] In wireless communications, dual selective channels suffer from time-varying fading and multipath delays. Time-varying fading has a specific Doppler power spectrum, resulting in time-selective channels and inter-carrier interference (ICI). Multipath delays have a certain delay power spectrum, resulting in frequency selective channels and inter-symbol interference (ISI). This is a particular problem in broadband wireless networks with mobile transceivers (eg, in vehicular communication networks and cellular networks). [0003] Adaptive equalization and pilot symbols are typically used to compensate for ISI and ICI. For example, pilot symbols or training sequences are inserted into packets sent to the receiver in order to estimate channel state information (C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06H04L25/03H04B7/01H04B7/0413
CPCH04L1/0048H04L1/0612H04L1/0631H04L25/03898H04L25/0391H04B7/01H04B7/0413H04L1/0058H04L27/2647H04L1/0625H04L1/0054
Inventor 秋浓俊昭菲利普·奥尔利克金耕进
Owner MITSUBISHI ELECTRIC CORP
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