Spread-spectrum changeable base station

• US 7,054,278 B2
• Filed: 11/26/2001
• Issued: 05/30/2006
• Est. Priority Date: 06/29/1994
• Status: Expired due to Fees

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Schilling, Donald L.
• Primary Examiner(s): Pham, Chi
• Assistant Examiner(s): JONES, PRENELL P
• Application Number:
  US09/994,290
• Publication Number:
  US 20020034174A1
• Time in Patent Office: 1,646 Days
• Field of Search: 370/261, 370/342, 370/343, 370/277, 370/260, 375/143, 375/147, 375/140, 455/524, 455/11.1, 455/450, 455/452.1, 455/561, 455/416, 455/507
• US Class Current: 370/261
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/7093 Matched filter type
• CPC Class Codes: H04M 2207/18 wireless networks
• CPC Class Codes: H04M 3/56 Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities video conference systems H04N7/15
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A base subunit receives a signal over a first frequency. A plurality of despread voice signals are produced using the received signal. The despread signals and a voice signal generated at the base subunit are combined. The combined signal is mixed with a chipping sequence. The mixed combined signal is transmitted at a second frequency.

Claims

1. A base subunit for use in a wireless spread spectrum communication system comprising:

an antenna for receiving a signal over a first frequency;

a plurality of mixers for mixing the received signal with a plurality of chipping sequences to produce a plurality of despread voice signals;

a combiner combining the despread signals and a voice signal generated at the base subunit;

a product device for mixing the combined signal with a chipping sequence; and

an antenna for transmitting the mixed combined signal at a second frequency.

2. The base subunit of claim 1 further comprising a demodulator for demodulating the despread voice signals prior to the combining.

3. The base subunit of claim 1 wherein the combiner comprises a first and second combiner, the first combiner combines the despread signals and the second combiner combining the combined despread signals with the voice signal generated at the base subunit.

4. The base subunit of claim 1 further comprising an analog to digital converter for converting the combined signal into a digital signal.

5. The base subunit of claim 3 wherein the output of the first combiner is a combined voice signal of a plurality of remote units.

9. The base subunit of claim 5 further comprising an analog to digital converter for converting the combined signal into a digital signal.

6. A base subunit for use in a wireless spread spectrum communication system comprising:

an antenna for receiving a signal over a first frequency;

a plurality of matched filters for mixing the received signal to produce a plurality of despread voice signals;

a combiner combining the despread signals and a voice signal generated at the base subunit;

a product device for mixing the combined signal with a chipping sequence; and

an antenna for transmitting the mixed combined signal at a second frequency.

7. The base subunit of claim 6 further comprising a demodulator for demodulating the despread voice signals prior to the combining.

8. The base subunit of claim 6 wherein the combiner comprises a first and second combiner, the first combiner combines the despread signals and the second combiner combining the combined despread signal with the voice signal generated at the base subunit.

10. The base subunit of claim 8 wherein the output of the first combiner is a combined voice signal of a plurality of remote units.

11. A base subunit for use in a wireless spread spectrum communication system comprising:

means for receiving a signal over a first frequency;

means for producing a plurality of despread voice signals using the received signal;

means for combining the despread signals and a voice signal generated at the base subunit;

means for mixing the combined signal with a chipping sequence; and

means for transmitting the mixed combined signal at a second frequency.

12. The base subunit of claim 11 wherein the producing means is a plurality of mixers.

13. The base subunit of claim 11 wherein the producing means is a plurality of matched filters.

14. The base subunit of claim 11 comprising a demodulator for demodulating the despread voice signals prior to the combining.

15. The base subunit of claim 11 wherein the combining means comprises a first and second combiner, the first combiner combines the despread signals and the second combiner combining the combined despread signals with the voice signal generated at the base subunit.

16. The base subunit of claim 11 further comprising an analog to digital converter for converting the combined signal into a digital signal.

17. The base subunit of claim 15 wherein the output of the first combiner is a combined voice signal of a plurality of remote units.