CDMA wireless base station

• US 20030069044A1
• Filed: 10/04/2002
• Published: 04/10/2003
• Est. Priority Date: 10/09/2001
• Status: Active Grant

• Current Assignee: Hitachi Kokusai Electric Incorporated (Hitachi, Ltd.)
• Original Assignee: Hitachi Kokusai Electric Incorporated (Hitachi, Ltd.)
• Inventors: Yotsumoto, Koji
• Granted Patent: US 6,993,344 B2
• Time in Patent Office: Days
• US Class Current: 455/561
• CPC Class Codes: H04B 1/7113 Determination of path profile
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Disclosed is a W-CDMA wireless base station adapted to meet various specifications over a wide range to dynamically change the allocated numbers of RACH'"'"'s and DPCH'"'"'s depending on a cell radius and the number of Signatures. The W-CDMA wireless base station that performs an optimal channel allocation based on parameters received from an external network, comprises: a preamble detection and path search section adapted to perform an RACH preamble detection in a reception base band signal or perform a path search of the reception base band signal; demodulation section adapted to demodulate the reception base band signal by including therein a plurality of fingers and combining outputs of the fingers; a control section adapted to control said preamble detection and path search section to switch itself either to a preamble detection section or to a path search section so as to change the allocated numbers of RACH'"'"'s and DPCh'"'"'s based on the parameters.

Claims

1. A CDMA wireless base station that performs a channel allocation based on parameters externally received, characterized by comprising:

a preamble detection and path search section adapted to perform a preamble detection in a reception base band signal or perform a path search of the reception base band signal;

demodulating means for demodulating the reception base band signal; and

controlling means for controlling said preamble detection and path search section so as to function either as a preamble detection section or as a path search section.

2. A CDMA wireless base station as claimed in claim 1, wherein said preamble detection and path search section comprises a plurality of matched filters, in the event that said controlling means controlling said preamble detection and path search section to function as the preamble detection section said plurality of matched filters being connected serially, and in the event that said controlling means controlling said preamble detection and path search section to function as the path search section said plurality of matched filters are each used to acquire different channel from other.