Waveform and frame structure for a fixed wireless loop synchronous CDMA communications system

US5966373A · kind A · utility

Assignee

• L-3 COMMUNICATIONS CORPORATION · US

Inventors

• Philip L. Stephenson · Salt Lake City, US
• Thomas R. Giallorenzi · Riverton, US
• Johnny M. Harris · Centerville, US
• Lee A Butterfield · Jordan, US
• Michael Hurst · South Jordan, US
• Dan M. Griffin · Bountiful, US
• Rolf K. Thompson · Orem, US

Key dates

• Filing date: Dec 10, 1997
• Grant date: Oct 12, 1999
• Expiry date: Dec 10, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/707
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

Disclosed is a method for transmitting information in a CDMA communication system, the method including steps of (a) multiplexing data and control information into a data stream; (b) encoding the data stream to form a stream of encoded I/Q symbol pairs; (c) inserting synchronization information into the stream of encoded I/Q symbol pairs; and (d) spreading the encoded I/Q symbol pairs and the inserted synchronization information using a same pseudonoise (pn) spreading code prior to transmission as a frame. The preferred frame structure includes an unencoded synchronization field followed by a plurality of multi-byte data fields. Individual ones of the plurality of data fields are separated by a control message field. Individual ones of the control message fields contain a single byte of a multi-byte control message frame.