Invention Grant
- Patent Title: Pilot signal in an FDMA communication system
- Patent Title (中): FDMA通信系统中的导频信号
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Application No.: US13210251Application Date: 2011-08-15
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Publication No.: US08279978B2Publication Date: 2012-10-02
- Inventor: James W. McCoy
- Applicant: James W. McCoy
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Gazdzinski & Associates, PC
- Main IPC: H03K9/00
- IPC: H03K9/00 ; H04L27/00 ; H04J11/00 ; G06F17/14 ; G06F17/15 ; H04B7/204

Abstract:
A method for receiving a pilot symbol in a receiver is disclosed. In one embodiment, the method includes removing a cyclic prefix from a received sequence to produce a modified sequence, transforming the modified sequence to a first frequency domain sequence according to a first transform, demapping a plurality of distributed subcarriers in the transformed modified sequence to extract a plurality of received symbols, deriving an intermediate channel estimate for each of the plurality of received symbols, and interpolating a final channel estimate based on the plurality of derived intermediate channel estimates. In one exemplary embodiment, the received symbols have one or more predefined characteristics such as a constant amplitude, and zero autocorrelation (CAZAC sequence).
Public/Granted literature
- US20110299384A1 PILOT SIGNAL IN AN FDMA COMMUNICATION SYSTEM Public/Granted day:2011-12-08
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