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Training sequence design and channel estimation method of transmission diversity block transmission system

A training sequence and channel estimation technology, applied in the field of digital information transmission, can solve the problems of noise interference, large error, difficult channel estimation, etc., and achieve the effect of low complexity and simple design method

Inactive Publication Date: 2009-07-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current research on transmit diversity systems mainly focuses on data diversity methods, and usually assumes that the receiver can obtain an ideal channel estimate
In practical applications, channel estimation is very difficult, and the error may be large, especially in multi-antenna systems, not only the interference of noise and the influence of channels, but also the simultaneous interference of other antennas at the same frequency

Method used

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  • Training sequence design and channel estimation method of transmission diversity block transmission system
  • Training sequence design and channel estimation method of transmission diversity block transmission system
  • Training sequence design and channel estimation method of transmission diversity block transmission system

Examples

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Effect test

Embodiment 1

[0067] Embodiment 1: Training sequence design and channel estimation method based on space-time (Alamouti code) in dual-antenna transmit diversity system

[0068] Step 101, the discrete Fourier transform domain of the training sequence sent by the two antennas at two adjacent times satisfies the Alamouti space-time coding relationship, that is

[0069] C 1 [ m + 1 , k ] = - C 2 * [ m , k ] C 2 ...

Embodiment 2

[0083] Embodiment 2: Training sequence design and channel estimation method based on space-time (Walsh code) in dual-antenna transmit diversity system

[0084] Step 201, the discrete Fourier transform domain of the training sequence sent by the two antennas at two adjacent times satisfies the Walsh (Walsh) space-time coding relationship, that is

[0085] C 2 [ m , k ] = C 1 [ m , k ] C 2 [ m + 1 ...

Embodiment 3

[0100] Embodiment 3: Training sequence design and channel estimation method based on space frequency (Alamouti code) in dual-antenna transmit diversity system

[0101] Step 301, the training sequence sent by different antennas at the same time satisfies space-frequency coding in two adjacent subcarriers in the discrete Fourier transform domain

[0102] C 1 [ m , k + 1 ] = - C 2 * [ m , k ] C 2 ...

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Abstract

The invention discloses a method for training sequence design and channel estimation of a transmitting diversity block transmission system based on a training sequence and a transmission system thereof. The method comprises the following steps: space time, space frequency, space code or combination thereof is selected to design a training sequence corresponding to all antennas according to the characteristics of the transmission channel; a transmitted end transmits the training sequence and the data to be transmitted by a plurality of antennas; a receiving end uses a received signal to construct a cyclic convolution of the training sequence and the channel impact response of the transmitting end to the receiving end; the channel impact response or the channel frequency response of the transmitting end to the receiving end is estimated according to the characteristics of the training sequence and then post processing is carried out. The design method for training sequence is simple, and the channel estimation method has low complexity and is characterized by channel self-adaptation and the like.

Description

technical field [0001] The invention belongs to the technical field of digital information transmission, and in particular relates to a training sequence design and channel estimation method of a training sequence-based transmit diversity block transmission system in a wireless communication system and a transmission system thereof. The training sequence design includes multiple training sequence design methods, and the block transmission technology includes training information carrying technology, block modulation technology, guard interval filling technology or preamble sequence technology. Background technique [0002] Broadband wireless transmission must face the problem of ISI (Inter Symbol Interference, Inter Symbol Interference) or frequency selective fading introduced by channel delay extension. Two block transmission technologies: OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) and SC-FDE (Single-Carrier Freuqency Domai...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L27/26H04L25/03
Inventor 彭克武杨昉王劲涛符剑杨知行
Owner TSINGHUA UNIV
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