发明公开
EP1148673A3 Idendification of a base station, using latin-square hopping sequences, in multicarrier spread-spectrum systems
审中-公开
通过使用基于所述拉丁方跳频在多载波扩频序列的基站的标识
- 专利标题: Idendification of a base station, using latin-square hopping sequences, in multicarrier spread-spectrum systems
- 专利标题(中): 通过使用基于所述拉丁方跳频在多载波扩频序列的基站的标识
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申请号: EP01303316.2申请日: 2001-04-09
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公开(公告)号: EP1148673A3公开(公告)日: 2004-01-07
- 发明人: Laroia, Rajiv , Li, Junyi , Rangan, Sundeep , Viswanath, Pramod
- 申请人: Flarion Technologies, INC.
- 申请人地址: Bedminster One, 135 Route 202/206 South Bedminster, NJ 07921 US
- 专利权人: Flarion Technologies, INC.
- 当前专利权人: Flarion Technologies, INC.
- 当前专利权人地址: Bedminster One, 135 Route 202/206 South Bedminster, NJ 07921 US
- 代理机构: Prins, Adrianus Willem
- 优先权: US551078 20000418
- 主分类号: H04L5/02
- IPC分类号: H04L5/02 ; H04B7/26 ; H04B1/69 ; H04J13/06 ; H04L27/26
摘要:
A base station having the strongest downlink signal is identified by utilizing a unique slope of a pilot tone hopping sequence being transmitted by a base station. Specifically, base station identification is realized by determining the slope of the strongest received pilot signal, i.e., the received pilot signal having the maximum energy. In an embodiment of the invention, the pilot tone hopping sequence is based on a Latin Squares sequence. With a Latin Squares based pilot tone hopping sequence, all a mobile user unit needs is to locate the frequency of the pilot tones at one time because the pilot tone locations at subsequent times can be determined from the slope of the Latin Squares pilot tone hopping sequence. The slope and initial frequency shift of the pilot tone hopping sequence with the strongest received power is determined by employing a unique maximum energy detector. In one embodiment, the slope and initial frequency shift of the pilot signal having the strongest received power is determined by finding the slope and initial frequency shift of a predicted set of pilot tone locations having the maximum received energy. In another embodiment, the frequency shift of the pilot signal with the strongest, i.e., maximum, received power is estimated at each of times "t". These frequency shifts are employed in accordance with a prescribed relationship to determine the unknown slope and the initial frequency shift of the pilot signal.
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