Apparatus and Method for Preamble Reception

• US 20030058972A1
• Filed: 10/25/2001
• Published: 03/27/2003
• Est. Priority Date: 03/09/2000
• Status: Abandoned Application

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Iochi, Hitoshi
• Application Number:
  US09/959,425
• Publication Number:
  US 20030058972A1
• Time in Patent Office: Days
• US Class Current: 375/343
• CPC Class Codes: H04L 7/042 Detectors therefor, e.g. correlators, state machines digital correlators in general G06F17/15

Abstract

Coherent detection correlation value calculation section 201 calculates correlation values for signatures in a received preamble. Non-coherent detection (j-segment) correlation value calculation section 202 calculates correlation values for the same signature by non-coherent detection. Maximum value detection section 203 detects a maximum correlation value from among the correlation values calculated by coherent detection and non-coherent detection. When the maximum correlation value is greater than a predetermined threshold, threshold determining section 104 recognizes, using the signature corresponding to this maximum correlation value, that the preamble generated and sent by a communication terminal apparatus corresponding to this signature has been received reliably.

Claims

1. A preamble reception apparatus comprising:

receiving means for receiving through a propagation path a communication start request signal generated by a communication terminal apparatus using a signal specific to said communication terminal apparatus from among known signals; and

detecting means for calculating a correlation value for each known signal for every detection process by a plurality of mutually different detection processes using the signal received by said receiving means.

2. The preamble reception apparatus according to claim 1, wherein the detecting means uses a coherent detection process and non-coherent detection process as the plurality of mutually different detection processes.

3. The preamble reception apparatus according to claim 2, wherein the non-coherent detecting means calculates a correlation value for each known signal by a plurality of non-coherent detection processes with the number of segments differing from one another.

4. The preamble reception apparatus according to claim 2, wherein the coherent detecting means and non-coherent detecting means share at least part of the configuration necessary to calculate correlation values.

5. The preamble reception apparatus according to claim 1, wherein the detecting means uses coherent detection processes and delay detection processes as the plurality of mutually different detection processes.

6. The preamble reception apparatus according to claim 5, wherein the delay detecting means calculates a correlation value for each known signal by a plurality of non-coherent detection processes with the number of segments differing from one another.

7. The preamble reception apparatus according to claim 5, wherein the coherent detecting means and delay detecting means share at least part of the configuration necessary to calculate correlation values.

8. Abase station apparatus equipped with a preamble reception apparatus, said preamble reception apparatus comprising:

receiving means for receiving through a propagation path a communication start request signal generated by a communication terminal apparatus using a signal specific to said communication terminal apparatus from among known signals; and

detecting means for calculating a correlation value for each known signal for every detection process by a plurality of mutually different detection processes using the signal received by said receiving means.

9. The base station apparatus according to claim 8, wherein the detecting means uses coherent detection processes and non-coherent detection processes as the plurality of mutually different detection processes.

10. The base station apparatus according to claim 8, wherein the detecting means uses coherent detection processes and delay detection processes as the plurality of mutually different detection processes.

11. A communication terminal apparatus that carries out radio communications with a base station apparatus equipped with a preamble reception apparatus, said preamble reception apparatus comprising:

receiving means for receiving through a propagation path a communication start request signal generated by a communication terminal apparatus using a signal specific to said communication terminal apparatus from among known signals; and

detecting means for calculating a correlation value for each known signal for every detection process by a plurality of mutually different detection processes using the signal received by said receiving means.

12. A preamble reception method comprising:

a receiving step of receiving through a propagation path a communication start request signal generated by a communication terminal apparatus using a signal specific to said communication terminal apparatus from among known signals; and

a detecting step of or calculating a correlation value for each known signal for every detection process by a plurality of mutually different detection processes using the signal received in said receiving step.