发明名称 |
Beamforming and interference cancellation system using general purpose filter architecture |
摘要 |
A beamforming system including a multiplier stage for providing a plurality of steered signal terms, each term being a product of an input signal term and a steering signal term. A filter multiplies the steered signal terms by a plurality of respective filter weights to provide a plurality of weighted products. The weighted products are summed to provide an output beam directionally responsive to the steering signal. A microprocessor provides the steering signal terms and the filter weights in response to the input signal and/or user input. In the preferred embodiment, the filter is a reconfigurable, general purpose matched filter configured to multiply a plurality of delayed representations of a respective one of the steered signal terms by a plurality of the weights to provide a plurality of intermediate weighted product terms. The filter further includes a summing circuit for accumulating the intermediate weighted product terms to provide a respective one of the plurality of weighted products. The inventive beamforming system cancels unwanted interference, while forming a beam to allow a desired signal to be received with a maximum signal-to-interference-plus-noise ratio (SINR). Through a data-capture RAM, the system allows interference samples to be collected and passed to a microprocessor to calculate the optimum filter weights. The received beam may be steered to any desired direction to form an optimal space-time adaptive matched filter.
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申请公布号 |
US6317467(B1) |
申请公布日期 |
2001.11.13 |
申请号 |
US20000593480 |
申请日期 |
2000.06.14 |
申请人 |
COX LLOYD C.;GRAMLICH GARY A.;BAKER ROBERT M.;FREEMAN STEPHEN;NEARY BRIAN P.;KRZEMIEN CYNTHIA R.;KRIM JORDAN A.;NUNEZ LUIS R. |
发明人 |
COX LLOYD C.;GRAMLICH GARY A.;BAKER ROBERT M.;FREEMAN STEPHEN;NEARY BRIAN P.;KRZEMIEN CYNTHIA R.;KRIM JORDAN A.;NUNEZ LUIS R. |
分类号 |
H04B7/06;(IPC1-7):H04B7/02;H04L1/02 |
主分类号 |
H04B7/06 |
代理机构 |
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代理人 |
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主权项 |
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