Spread spectrum base station

• US 20020118660A1
• Filed: 02/08/2002
• Published: 08/29/2002
• Est. Priority Date: 12/05/1990
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Schilling, Donald L.
• Granted Patent: US 6,925,071 B2
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: G01S 13/82 wherein continuous-type signals are transmitted
• CPC Class Codes: G01S 5/0036 of measured values, i.e. measurement on mobile and position calculation on base station
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/71 the interference being narrowband interference
• CPC Class Codes: H04B 1/7102 with transform to frequency domain
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04B 2201/709709 Methods of preventing interference
• CPC Class Codes: H04B 7/18547 for geolocalisation of a station position fixing by direction or distance determination G01S5/00
• CPC Class Codes: H04B 7/216 Code division or spread-spectrum multiple access [CDMA, SSMA]
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence
• CPC Class Codes: H04B 7/2631 for broadband transmission
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 64/006 with additional information processing, e.g. for direction or speed determination
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 : Access point devices

Abstract

A spread spectrum base station receives a spread spectrum signal. The spread spectrum signal includes a reference signal and a message signal. The message signal has message data. The reference signal is detected within the received combined spread spectrum signal. The message data of the message signal is recovered using the reference signal.

A spread spectrum base station produces a message signal having message data. A reference signal is produced. The reference signal is used to recover the message data from a combined spread spectrum signal. The reference signal and the message signal is combined as a combined signal. The combined signal is transmitted as the combined spread spectrum signal.

Claims

1. A spread spectrum base station comprising:

means for receiving a spread spectrum signal, the spread spectrum signal including a reference signal and a message signal, the message signal having message data;

means for detecting the reference signal within the received combined spread spectrum signal; and

means for recovering the message data of the message signal using the reference signal.

2. The base station of claim 1 further comprising:

means for recovering a carrier signal from the spread spectrum signal using the reference signal; and

wherein the message data recovering means uses the recovered carrier signal to recover the message data.

3. The base station of claim 1 wherein the spread spectrum signal is in a code division multiple access format.

4. A spread spectrum base station comprising:

means for receiving a spread spectrum signal, the spread spectrum signal including a reference signal and a message signal, the message signal having message data;

means for recovering a carrier signal of the combined spread spectrum signal using the reference signal; and

means for recovering the message data using the recovered carrier signal.

5. The base station of claim 4 wherein the spread spectrum signal is in a code division multiple access format.

6. A spread spectrum base station comprising:

means for producing a message signal having message data;

means for producing a reference signal, the reference signal for use in recovering the message data from a combined spread spectrum signal;

means for combining the reference signal and the message signal as a combined signal; and

means for transmitting the combined signal as a combined spread spectrum signal.

7. A spread spectrum base station comprising:

means for producing a plurality of message signals, each message signal having message data;

means for producing a reference signal, the reference signal for use in recovering the message data from a combined spread spectrum signal;

means for combining the reference signal and the plurality of message signals as a combined signal; and

means for transmitting the combined signal as the combined spread spectrum signal.