Transmitting an information signal over antennas

• US 20050185627A1
• Filed: 04/20/2005
• Published: 08/25/2005
• Est. Priority Date: 09/06/1994
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: LaVean, Gilbert E., Bolgiano, D. Ridgely
• Granted Patent: US 8,130,696 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

An information signal is spread with a first spreading sequence producing a first spread signal for transmission over a first antenna. The information signal is spread with the first spreading sequence producing a second spread signal for transmission over a second antenna. The second antenna is not the first antenna. The relative position of the information signal and the first spreading sequence is different in the second spread signal than the first spread signal.

Claims

1. A method comprising:

spreading an information signal with a first spreading sequence producing a first spread signal for transmission over a first antenna; and

spreading the information signal with the first spreading sequence producing a second spread signal for transmission over a second antenna, the second antenna not being the first antenna, the relative position of the information signal and the first spreading sequence is different in the second spread signal than the first spread signal.

2. The method of claim 1 wherein the first and second spread signals are time aligned to start at a beginning of a time slot.

3. A station comprising:

a first CDMA encoder for spreading an information signal with a first spreading sequence producing a first spread signal;

a first CDMA transmitter and a first antenna for transmitting the first spread signal;

a second CDMA encoder for spreading the information signal with the first spreading sequence producing a second spread signal, the relative position of the information signal and the first spreading is different in the second spread signal than the first spread signal; and

a second CDMA transmitter and a second antenna for transmitting the second spread signal, the second antenna not being the first antenna.

4. The station of claim 3 wherein the first and second spread signals are time aligned to start at a beginning of a time slot.

5. A method comprising:

receiving a first spread signal transmitted from a first antenna;

receiving a second spread signal transmitted from a second antenna, the second antenna different than the first antenna;

despreading the first spread signal using a first spreading sequence and producing an information signal;

despreading the second spread signal using the first spreading sequence and producing the information signal, the relative position of the information signal and the first spreading sequence is different in the second spread signal than the first spread signal; and

combining or selecting one of the information signal produced from the first spread sequence and the information signal produced from the second spread sequence.

6. The method of claim 5 wherein the first and second spread signals are time aligned to start at a beginning of a time slot.

7. A subscriber station comprising:

an antenna for receiving a first spread signal transmitted from a first antenna and receiving a second spread signal transmitted from a second antenna, the second antenna different than the first antenna;

a CDMA receiver for despreading the first spread signal using a first spreading sequence and producing an information signal and despreading the second spread signal using the first spreading sequence and producing the information signal, the relative position of the information signal and the first spreading sequence is different in the second spread signal than the first spread signal; and

a combiner for combining or selecting one of the information signal produced from the first spread sequence and the information signal produced from the second spread sequence.