Invention Grant
- Patent Title: Pilot signal in an FDMA communication system
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Application No.: US14853451Application Date: 2015-09-14
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Publication No.: US10250346B2Publication Date: 2019-04-02
- Inventor: James McCoy
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons Hood Kivlin Kowert & Goetzel, P.C.
- Main IPC: H04J1/12
- IPC: H04J1/12 ; H04L5/00 ; H04L27/26 ; H04L25/02

Abstract:
Methods (500, 800) and corresponding systems (100, 200, 300, 400, 900) for generating a pilot symbol (330) include providing an M-point parallel transform sequence that is a discrete Fourier transform of a CAZAC sequence (312, 504-508). The M-point parallel transform sequence (312) is distributed (316, 510) to a set of M subcarriers among N subcarriers to form an N-point frequency-domain sequence (318) wherein the M subcarriers are evenly spaced apart. An N-point inverse fast Fourier transform (320, 512) is performed to convert the N-point frequency-domain sequence to an N-point time-domain sequence (322). The N-point time-domain sequence is converted (324, 514) to a serial sequence (326), and a cyclic prefix is added (328, 516) to the serial sequence to form a pilot symbol (330).
Public/Granted literature
- US20160006524A1 Pilot Signal in an FDMA Communication System Public/Granted day:2016-01-07
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