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MC-DS-CDMA uplink receiving method and device for array antenna

A technology of MC-DS-CDMA and array antenna, applied in diversity/multi-antenna system, multiplexing communication, code division multiplexing system, etc., can solve complex signal processing problems, achieve complexity reduction, Suppresses multiple access interference and minimizes system performance degradation

Inactive Publication Date: 2008-01-16
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the basic structure and uplink receiving method of the existing array antenna MC-DS-CDMA system proposed under the basic concept of MC-DS-CDMA are very different from the method proposed by the present invention, and the signal processing is complicated

Method used

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  • MC-DS-CDMA uplink receiving method and device for array antenna
  • MC-DS-CDMA uplink receiving method and device for array antenna
  • MC-DS-CDMA uplink receiving method and device for array antenna

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Embodiment 1

[0026] Embodiment 1: The method of the present invention is discussed below:

[0027] 1. Separation of subcarrier signals

[0028] Investigate the uplink of the array antenna MC-DS-CDMA system, the base station uses an array antenna, and the mobile station uses a single antenna. The uplink transmission scheme of the mobile station adopts a typical single-antenna MC-DS-CDMA transmission scheme [Hara S and Prasad R.An Overview of Multi-carrier CDMA.IEEE Comm.Mag.1997; 35(12), pp.126-33. Hara S and Prasad R. Multi-carrier CDMA review. IEEE Communications Journal, 1997; 35(12), pp.126-33] and Binary Phase Shift Keying (Binary Phase Shift Keying, BPSK) modulation.

[0029] Suppose there are K mobile users in a cell in the system. For the MC-DS-CDMA transmission scheme, each subcarrier carries independent user information, so the signal transmitted by the lth subcarrier of the kth (1≤k≤K) user can be expressed as:

[0030] s k ...

Embodiment 2

[0114] The method of the invention is applicable to any array antenna mobile communication system adopting MC-DS-CDMA transmission scheme.

[0115] With reference to any user k arbitrary subcarrier l array antenna MC-DS-CDMA system uplink spatial domain combined receiving structure block diagram of Fig. 1, the specific steps of a kind of array antenna MC-DS-CDMA system uplink receiving method comprise:

[0116] Step 1, the signal r received by the first array element of the array antenna 1 (t),..., the signal r received by the Nth array element N (t) Send them to the carrier signal separation modules (1-1),..., (1-N) corresponding to the 1st, ..., N array elements respectively, and the N carrier separation modules complete the input signal and the modulation mode of the transmitting end The corresponding subcarrier cos(ω l t) The operation of multiplication realizes the separation of subcarrier signals, corresponding to the first, ..., the signals of the lth subcarrier of th...

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Abstract

The invention relates to an uplink receiving method of array antenna MC-DS-CDMA system. The method is carried out with the steps that: first, the signals received by each array unit of the array antenna are respectively transmitted to carrier signal separation modules and are multiplied with a corresponded sub-carrier, which realizes the sub-carrier signal separation and obtains an output signal; second, de-spread and matched filter process to each separated array unit sub-carrier signal are carried out to realize user signal de-spreading and get the user sub-carrier signal matched filter output; third, the matched filter output signals on different array units are combined in the air domain to get user sub-carrier signal final judge variable and get the air domain diversity gain; fourth, user sub-carrier signal final judge variable after air domain combination is judged to get the user sub-carrier signal judge result. The method obviously enhances MC-DS-CDMA system performance.

Description

technical field [0001] The invention relates to an array antenna MC-DS-CDMA uplink receiving method and device, and belongs to the technical field of array antennas for MC-DS-CDMA cellular mobile communication systems. Background technique [0002] In the third generation (3G) mobile communication system, CDMA is the most important technology, and multi-carrier modulation will be the key technology of the future broadband wireless transmission system. Combining multi-carrier technology with CDMA technology to form a multi-carrier CDMA system is one of the important directions for future mobile communication development. The combination of multi-carrier technology and CDMA technology mainly includes three typical forms: multi-carrier CDMA (MC-CDMA), multi-carrier direct-sequence spread spectrum CDMA (MC-DS-CDMA) and multi-tone modulation CDMA (MT-CDMA). [Hara S and Prasad R.An Overview of Multi-carrier CDMA.IEEEComm.Mag.1997;35(12),pp.126-33.;Hara S and Prasad R.An Overview ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04J13/04H04L27/26
Inventor 杨维陈俊仕
Owner BEIJING JIAOTONG UNIV
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