发明公开
EP1932310A2 QUICK DETECTION OF SIGNALING IN A WIRELESS COMMUNICATION SYSTEM
审中-公开
EINEM DRAHTLOSEN KOMMUNIKATIONSSYSTEM中的SCHNELLE DETEKICK DER SIGNALISIERUNG
- 专利标题: QUICK DETECTION OF SIGNALING IN A WIRELESS COMMUNICATION SYSTEM
- 专利标题(中): EINEM DRAHTLOSEN KOMMUNIKATIONSSYSTEM中的SCHNELLE DETEKICK DER SIGNALISIERUNG
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申请号: EP06814948.3申请日: 2006-09-15
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公开(公告)号: EP1932310A2公开(公告)日: 2008-06-18
- 发明人: SUBRAHMANYA, Parvathanathan , SHESHADRI, Thejaswi, Bharadwaj, Madapushi , CHAWLA, Vivek
- 申请人: Qualcomm Incorporated
- 申请人地址: 5775 Morehouse Drive San Diego, CA 92121 US
- 专利权人: Qualcomm Incorporated
- 当前专利权人: Qualcomm Incorporated
- 当前专利权人地址: 5775 Morehouse Drive San Diego, CA 92121 US
- 代理机构: Heselberger, Johannes
- 优先权: US228045 20050915
- 国际公布: WO2007035737 20070329
- 主分类号: H04L27/227
- IPC分类号: H04L27/227
摘要:
Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.
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