Method and system for economical beam forming in a radio communication system,申请号US20010791503-传众专利搜索

Method and system for economical beam forming in a radio communication system

申请公布号：US2002009062(A1)

申请号：US20010791503

申请日期：2001.02.23

申请公布日期：2002.01.24

申请人：

TANTIVY COMMUNICATIONS, INC.

发明人：PROCTOR JAMES A.;LAMONT LAWRENCE WAYNE;NELSON GEORGE RODNEY;ROUPHAEL ANTOINE J.;HOFFMAN JOHN E.

分类号：H04B7/04;H04B7/08;H04J11/00;H04W88/08;(IPC1-7):H04B7/216

主分类号：H04B7/04

摘要：Codes are applied to signals to reduce the number of transceivers and associated RF cabling extending from base electronics to antenna array electronics in a base station providing beam forming. The transceivers can be reduced to as few as one, and the RF cabling can be reduced to none. The codes may be orthogonal codes, such as Walsh codes. The codes are applied: to weights used to produce the beam forming, signal being transmitted or received, or both. The codes are applied a second time to decompose the coded weights/signal to associate the weights and signal with the beam forming. The coded weights/signal can be summed, including with other coded weights/signals, to produce a composite code division multiplexed signal for transmission between transceiver(s) and antenna array electronics over a single RF or non-RF cable spanning between the base electronics and array electronics. The complexity, size, and cost of electronics and cables are reduced, and calibration of transceivers and demodulators can be eliminated.