Invention Grant
- Patent Title: Quick detection of signaling in a wireless communication system
- Patent Title (中): 在无线通信系统中快速检测信令
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Application No.: US13216779Application Date: 2011-08-24
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Publication No.: US08170084B2Publication Date: 2012-05-01
- Inventor: Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
- Applicant: Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Kristine U. Ekwueme
- Main IPC: H04B1/00
- IPC: H04B1/00

Abstract:
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.
Public/Granted literature
- US20110306315A1 Quick Detection of signaling in a Wireless Communication System Public/Granted day:2011-12-15
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