Signal detection method for stbc‑ofdm system with missing cyclic prefix

A technology of STBC-OFDM and cyclic prefix, applied in the field of wireless and mobile communication
CN103188053BInactive Publication Date: 2017-02-15UNIV OF ELECTRONICS SCI & TECH OF CHINA
1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2017-02-15
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a signal detection method of an STBC-OFDM system under the absence of a cyclic prefix, belonging to the technical field of wireless communication. The invention makes the OFDM transmission system equivalent to N parallel Gaussian channels with different gains by eliminating the inter-symbol interference and the reconstruction of the circular convolution, and then utilizes the orthogonality of the inter-antenna channel matrix to complete the STBC-OFDM symbol detection. For the STBC-OFDM system with two transmissions and one reception, firstly, the data received in the first time slot is eliminated by inter-symbol interference, and the initial approximation of the circular convolution of the two time slots is used, and then the orthogonality of the spatial channel matrix and the frequency domain channel The diagonality of the matrix completes the data detection of the STBC-OFDM system, and finally repairs the cyclic prefix of the two time slot data through iteration, and at the same time eliminates the inter-symbol interference for the received data of the second time slot to improve the accuracy of data detection .
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of wireless and mobile communication, and in particular relates to a technique for eliminating inter-symbol interference and cyclic prefix reconstruction under the condition that a cyclic prefix is ​​absent in an STBC-OFDM system, and further performing inter-symbol interference elimination and cyclic prefix reconstruction through iteration. The repair of cyclic prefix reconstruction, and then reach the signal detection method of ideal detection performance. Background technique

[0002] As an effective anti-fading transmit diversity technology, Space Time Block Codes (STBC) technology is relatively simple to implement encoding and decoding, using maximum likelihood (ML) decoding, which only involves simple linear processing operation. However, it is generally applicable to flat fading channels of narrowband wireless systems. For channels with obvious multipath, complex channel equalization technology is re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More