发明名称 |
METHOD AND APPARATUS FOR JOINT DETECTION OF DATA IN A DIRECT SEQUENCE SPREAD SPECTRUM COMMUNICATIONS SYSTEM |
摘要 |
Joint detection of data signals occurs in a code division, multiple access (CDMA) communication system as follows: a digital signal processor (315) first extracts a midamble portion of transmitted signal vectors and generates an estimate of the channel response corresponding to each user-antenna pair using a channel estimator (401). In the preferred embodiment, each user's transmission within the communication system comprises either the type-1 or type-2 burst with varying midamble and guard period durations. Next, a convolution processor (402) forms the convolution of the user signature sequence with the channel impulse response estimate associated with each user and each of the antennas (308-310). A detector (403) utilizes the set of vectors and creates a set of sub-system matrices and solves the sub-system matrices to extract symbol information from an individual remote unit's transmission. Finally, the detector (403) outputs symbol information for subsequent infrastructure processing.
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申请公布号 |
WO9940698(A1) |
申请公布日期 |
1999.08.12 |
申请号 |
WO1998US24367 |
申请日期 |
1998.11.13 |
申请人 |
MOTOROLA INC. |
发明人 |
STEWART, KENNETH, A.;QIAO, YI |
分类号 |
H04K1/02;H04B7/08;H04L27/18;(IPC1-7):H04B15/00;H04K1/00;H04L27/30 |
主分类号 |
H04K1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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