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Intelligent antenna message transceiving method for CDMA high speed data base station

A base station transceiver and high-speed data technology, applied in diversity/multi-antenna systems, space transmit diversity, baseband system components, etc., can solve problems affecting system performance and user data transmission services

Inactive Publication Date: 2012-07-04
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the adoption of the TDMA method, the inherent multiple access interference of the CDMA system can be effectively overcome, but due to the complexity of the mobile environment, multiple access interference still exists, which will affect the further improvement of system performance
At the same time, with the increase of user demand, the uplink capacity is also challenged, seriously affecting the data transmission service between users

Method used

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  • Intelligent antenna message transceiving method for CDMA high speed data base station
  • Intelligent antenna message transceiving method for CDMA high speed data base station
  • Intelligent antenna message transceiving method for CDMA high speed data base station

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Effect test

Embodiment 1

[0096] In this embodiment, the present invention is used to increase the uplink and downlink capacity of the existing CDMA2000 1X EV-DO mobile communication system, and the smart antenna technology can be used in the cdma2000 1X EV-DO system base station transceiver equipment to realize uplink Directional reception and directional transmission for downlink high-speed data users. Its smart antenna element adopts 8-element linear array or circular array, and the distance between the array elements is half of the signal wavelength.

[0097] In this embodiment, the base station terminal receiving letter is as follows: Figure 4 As shown, this figure shows the data processing process of uplink voice or low-speed data users at the receiving end of the cdma2000 1x system base station. S in the picture 11 , S 21 ,...,S 81 The received signal for 8 array elements is output by down-conversion, and then the baseband signal S is obtained by quadrature amplitude demodulation circuit an...

Embodiment 2

[0116] In this embodiment, a smart antenna is used to realize the base station transceiver method of CDMA2000 1x EV-DO. The requirement of the smart antenna element and the downlink signaling method of the base station are the same as those in the first embodiment, and will not be discussed here. The difference is that when the base station uses the smart antenna to receive the uplink data in a directional way, the direction of arrival estimation and the implementation method of the beamforming circuit are different.

[0117] Figure 6 Shown is the block diagram of the receiving circuit of the base station in the second embodiment. The receiving process is as follows:

[0118] 1) down-conversion signal (S 1 , S 2 ,...,S 8 ) through the carrier beamforming circuit (including weighted summation circuit 62, weight coefficient modulation circuit 64) to realize directional reception, the signal S after directional reception is sent to the quadrature amplitude demodulation circu...

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Abstract

The invention relates to an intelligent aerial signal receiving and transmitting method of CDMA high speed data base station, belonging to the mobile communication technical field. The method adopts intelligent aerial technology in base station uplink signal receiving and downlink high speed data transmitting circuit and transmits the signal for the downlink voice user continuously adopts common sector directive aerial technology in the CDMA2000. The invention also relates to a base station uplink signal receiving and transmitting circuit and a downlink high speed data base station signal transmitting circuit, wherein, the uplink signal receiving wave beam figuration circuit can adopt two kinds of wave beam figuration method, namely the baseband wave beam figuration method and the carrierwave beam figuration method; the wave beam figuration method of the downlink signal transmitting can only adopt the carrier wave figuration method. The downlink wave beam figuration weight value can be instantly and directly obtained by the table look-up operation, using the uplink wave reaching direction DOA estimation, without predicting estimation on the downlink independent carrier frequency.

Description

technical field [0001] The invention relates to a mobile communication method, in particular to a mobile communication method for improving CDMA2000 1x EV-DO uplink / downlink communication efficiency by adopting a smart antenna, and belongs to the technical field of mobile communication. Background technique [0002] In order to meet the requirements of the third-generation mobile communication system to provide high-speed data users with services such as Internet and multimedia, WCDMA and TD-SCDMA have proposed their own evolution plans HSDPA and HSUPA. As one of the relatively mature 3G standards, CDMA2000, 3GPP2 has successively released various versions of CDMA2000 1x EV-DO, which also have the functions of HSDPA and HSUPA, to support the extension of CDMA2000 1x standard to wireless Internet, and provide high-speed mobile Data users improve uplink / downlink multi-rate services. The outstanding change of CDMA2000 1x EV-DO is that an independent frequency point is added in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/08H04L25/03
Inventor 贾向东傅海阳赵来强郑建光
Owner NANJING UNIV OF POSTS & TELECOMM
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