Antenna array communication using spreading codes

• US 7,813,413 B2
• Filed: 12/22/2005
• Issued: 10/12/2010
• Est. Priority Date: 09/10/1999
• Status: Expired due to Fees

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Mesecher, David K.
• Primary Examiner(s): Ghebretinsae; Temesghen
• Application Number:
  US11/315,795
• Publication Number:
  US 20060098720A1
• Time in Patent Office: 1,755 Days
• Field of Search: 375/147, 375/316, 375/130, 375/219, 375/148, 370/335, 370/342, 455/500, 455/522, 455/69, 455/67.1
• US Class Current: 375/147
• CPC Class Codes: H04B 1/712 Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04B 7/0613 using simultaneous transmission H04B7/0686 takes precedence
• CPC Class Codes: H04B 7/0615 of weighted versions of same signal
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001
• CPC Class Codes: H04B 7/0634 Antenna weights or vector/matrix coefficients
• CPC Class Codes: H04B 7/0678 using different spreading codes between antennas code allocation H04J13/16
• CPC Class Codes: H04B 7/0845 per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch rake receivers as such H04B1/7115
• CPC Class Codes: H04B 7/0854 using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
• 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 7/0891 Space-time diversity rake receivers H04B1/7115; space-time decoding H04L1/0631
• CPC Class Codes: H04J 13/0003 Code application, i.e. aspects relating to how codes are applied to form multiplexed channels

Abstract

A first reference signal and a first data signal are transmitted from a first antenna of a base station and a second reference signal and a second data signal are transmitted from a second antenna of the base station. The first and second antennas are difference antennas. The first and second reference signals having different codes and the first and second data signals having different codes. The received first and second reference signals are combined using an adaptive algorithm producing adaptive algorithm weights. Data from the first and second data signals is recovered by combining the first and second data signal in response to adaptive algorithm weights.

Claims

1. A user equipment (UE) comprising:

circuitry, operatively coupled to at least one antenna, configured to receive a spread spectrum signal comprising a first pilot signal, a second pilot signal, and a data signal;

wherein the first pilot signal is associated with a first antenna of a base station and the second pilot signal is associated with a second antenna of the base station and the first and second pilot signal having a different chip sequence, wherein the received data signal comprises two antenna specific chip sequences, each antenna specific chip sequence being associated with the respective transmission antenna;

the circuitry further configured to process the first and second pilot signals to derive preferred weights for the data signal, wherein the first and second pilot signals have a different channel code than the data signal; and

circuitry configured to combine a data bit associated with the first antenna with a corresponding data bit associated with the second antenna using the preferred weights.

2. The UE of claim 1 further comprising:

circuitry configured to weight the data bit associated with the first antenna with the preferred weights derived from the first pilot signal.

3. The UE of claim 2, further comprising:

circuitry configured to weight the data bit associated with the second antenna with the preferred weights derived from the second pilot signal.

4. A method for use in a user equipment (UE), the method comprising:

receiving a spread spectrum signal comprising a first pilot signal, a second pilot signal, and a data signal;

wherein the first pilot signal is associated with a first antenna of a base station and the second pilot signal is associated with a second antenna of the base station and the first and second pilot signal having a different chip sequence, wherein the received data signal comprises two antenna specific chip sequences, each antenna specific chip sequence being associated with the respective transmission antenna;

processing the first and second pilot signals to derive preferred weights for the data signal, wherein the first and second pilot signals have a different channel code than the data signal; and

combining a data bit associated with the first antenna with a corresponding data bit associated with the second antenna using the preferred weights.

5. The method of claim 4 further comprising weighting the data bit associated with the first antenna with the preferred weights derived from the first pilot signal.

6. The method of claim 5, further comprising:

weighting the data bit associated with the second antenna with the preferred weights derived from the second pilot signal.