METHOD AND APPARATUS FOR RECEIVING CODE TRANSMISSIONS OVER TIMESLOTS AND ANTENNAS

• US 20080219234A1
• Filed: 05/19/2008
• Published: 09/11/2008
• Est. Priority Date: 09/06/1994
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Bolgiano, D. Ridgely, LaVean, Gilbert E.
• Granted Patent: US 8,432,867 B2
• Time in Patent Office: Days
• US Class Current: 370/342
• CPC Class Codes: G01S 5/10 Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements , e.g. omega or decca systemsG01S5/12 takes precedence ; beacons and receivers cooperating therewith G01S1/306, G01S1/308
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0671 using different delays between antennas
• CPC Class Codes: H04B 7/082 selecting best antenna path
• CPC Class Codes: H04B 7/0857 using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
• CPC Class Codes: H04B 7/0888 with selection
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A plurality of antennas transmit a first spread spectrum signal having an associated code. The first spread spectrum signal is received at the wireless user. For each received first spread spectrum signal, a second spread spectrum signal is transmitted having an associated code having a same phase as that received first spread spectrum signal. The second spread spectrum signals are received at the plurality of antennas. A distance measurement is determined between each antenna and the wireless user based on in part a received timing of the second signals. The wireless user'"'"'s location is determined based on in part the distance determinations.

Claims

1. A code division multiple access (CDMA) subscriber unit comprising:

an antenna configured to receive a radio frequency signal carrying time divisional multiplexed information over a plurality of time slots; and

a circuit operatively coupled to the receiver configured to process a spread coded portion of the information associated with one of the plurality of time slots, wherein the circuit is further configured to output a frequency hopped signal carrying the portion of the information.

2. A method for use in a subscriber unit, the method comprising:

receiving a radio frequency signal carrying time divisional multiplexed information over a plurality of time slots; and

processing a spread coded portion of the information associated with one of the plurality of time slots; and

outputting a frequency hopped signal carrying the portion of the information.