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CDMA-TDMA intelligent antenna transceiving method and device

A technology of smart antenna and time division multiple access, applied in the field of mobile communication, can solve the problems of difficulty in implementation, decrease in equipment cost performance, increase in power generation, etc. Effect

Inactive Publication Date: 2009-08-12
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the analysis of published relevant data, since the smart antenna defined by the TD-SCDMA standard is extremely complex in multi-code channel applications, it is difficult to realize
As a result, the actual number of downlink users in the cell decreases and the required transmission power increases, which greatly reduces the cost performance of equipment.

Method used

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  • CDMA-TDMA intelligent antenna transceiving method and device
  • CDMA-TDMA intelligent antenna transceiving method and device
  • CDMA-TDMA intelligent antenna transceiving method and device

Examples

Experimental program
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Embodiment 1

[0032] In the code division multiple access time division multiple access smart antenna transceiver base station equipment of this embodiment, the receiving circuit including the coherent carrier recovery and the angle of arrival detection part is as follows figure 1 As shown, it mainly includes receiving antenna 1-1, radio frequency circuit 1-2, mid-amble inverse modulation circuit 1-3, receiving weighting circuit 1-4, beam forming and power measurement circuit 1-5, local mid-amble Generation, reprocessing and phase adjustment modules 1-6. The eight-way output ends of the antenna 1-1 are connected to the eight-way input ends of the mid-amble inverse modulation circuit 1-3 through the radio frequency circuit 1-2. The two output terminals of the local midamble generation, reprocessing and phase adjustment modules 1-6 are connected to the two input terminals of the midamble inverse modulation circuit 1-3. The eight output ends of the center code inverse modulation circuit 1-3 a...

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PUM

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Abstract

The method includes steps: in device including send receive circuit of communication base station, sending QPSK signal to inverse modulation circuit of middle setting code makes multiplication between QPSK signal and local middle setting code; adjusting local middle setting phase to align to the middle setting phase of QPSK signal; sending filtered coherent carrier to weighting circuit of reception to carry out addition; sending the output signal of beam forming and power measuring circuit to the weighting circuit of reception, and adjusting phase of coherent carrier of reception till maximum output power is obtained; the weighted value at this time is as value of transmitting circuit; executing each steps of directional transmitting signal so as to complete send receive signal. Using equipment in smaller power, the method implements transmitting signal in larger power in system of space division multiple access (SDMA) so as to raise use factor of transmitting power remarkably.

Description

technical field [0001] The present invention relates to a kind of space division multiple access method that realizes TD-SCDMA (Time Division Duplex Synchronous Code Division Multiple Access) standard expectation, also relates to the mobile communication base station transceiver equipment that realizes this method at the same time, especially the TD that uses smart antenna -SCDMA base station transceiver equipment, belonging to the technical field of mobile communication. Background technique [0002] TD-SCDMA base station transceiver equipment using smart antenna is a high-tech product in the field of mobile communication. This high-tech equipment is used in the base station transmitter of the TD-SCDMA mobile communication standard to realize communication with mobile phones and reduce the impact of multi-user interference. According to the analysis of published relevant materials, because the smart antenna defined by the TD-SCDMA standard is extremely complex in multi-cod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W88/08H04B7/04H04B1/707H04B7/26H04B7/06H04B7/08
CPCY02B60/50Y02D30/70
Inventor 傅海阳张青董黎高鹏钟橙
Owner NANJING UNIV OF POSTS & TELECOMM