Method and system for improving communication

• US 6,697,641 B1
• Filed: 12/30/1998
• Issued: 02/24/2004
• Est. Priority Date: 03/03/1997
• Status: Expired due to Fees

• Current Assignee: Celletra Ltd. (Unity Wireless Corp.)
• Original Assignee: Celletra Ltd. (Unity Wireless Corp.)
• Inventors: Shapira, Joseph
• Primary Examiner(s): Trost; William
• Assistant Examiner(s): ZEWDU, MELESS NMN
• Application Number:
  US09/171,986
• Time in Patent Office: 1,882 Days
• Field of Search: 455/277.1,277.2,278.1,279.1,562,561,522.1 342/372,373,361,367,368,359 343/700
• US Class Current: 455/562.1
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 3/2676 Optically controlled phased array
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 7/06 at the transmitting station
• CPC Class Codes: H04B 7/0848 Joint weighting
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04W 88/085 Access point devices with remote components
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Method and device for enhancing performance of a base station (112) transceiver by detecting signal received from a mobile transceiver (140) by at least two antennas (H, V), thereby producing a plurality of received signal portions, determining the polarization of a signal transmitted to the mobile transceiver (140) according to the detected polarization characteristics, providing the reassembling the received signal from the received signal portions according to the detected polarization characteristics and alternatively dithering the polarization of the transmitted signal.

Claims

1. A modular cellular wireless communication base station comprising:

a plurality of pairs of respectively orthogonal polarization antennas, each pair having a respective location,

a plurality of active radiator modules located each at one of said respective antenna pair locations, each module associated with antenna pair corresponding to said location,

for each antenna a transmitter comprising a power amplifier, and a receiver;

for each module a beam-forming network controlling relative amplitudes and phases of each of said modules;

an RF front end for transmitting over a low power link with said plurality of active radiator modules via said beam forming network and for receiving over a lower power link via a low noise amplifier;

and a delay diversity module, located to operate on a low power signal prior to amplification by a respective one of said power amplifiers, that provides a transmission CDMA delay diversity.

2. A modular cellular wireless communication base station according to claim 1 and wherein said delay diversity module comprises:

a SAW delay line, and

an amplifier that compensates for a delay line insertion loss.

3. A modular cellular wireless communication base station according to claim 1 and wherein said delay diversity module is connected at a transmission beam forming network input.

4. A modular cellular wireless communication base station according to claim 1 and wherein said delay diversity module is connected at an active antenna transmission input.