CDMA code generator employing mixing ergodic transformation

US5726658A · kind A · utility

Assignee

• H&E CO., LTD · US

Inventors

• Louis Auslander · Pelham Manor, US
• Paolo Emilio Barbano · New York, US
• Urban Von der Embes · Moraga, US
• Xiang-Gen Xia · Shanghai, CN
• Roy M. Matic · Newbury Park, US

Key dates

• Filing date: Jun 3, 1996
• Grant date: Mar 10, 1998
• Expiry date: Jun 3, 2016

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/69
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A codeword generator produces codewords in the form of digital electronic signals which may be employed, for example, in spread spectrum communications system or RADAR systems. The generator effects a mixing ergodic transformation upon a suitable irrational number to produce a complex number sequence. The generator truncates the complex number sequence to a predetermined length, thus forming a codeword. The generator then forms other codewords within a family by permuting this first codeword. Other families of codewords may be generated by employing another mixing ergodic transform to transform the same irrational number or another suitable irrational number.