CDMA receiving apparatus and method

• US 7,233,614 B2
• Filed: 08/01/2001
• Issued: 06/19/2007
• Est. Priority Date: 08/02/2000
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Hondo, Shinya
• Primary Examiner(s): Corrielus; Jean B.
• Application Number:
  US09/918,497
• Publication Number:
  US 20020018485A1
• Time in Patent Office: 2,148 Days
• Field of Search: 375/148, 375/149, 375/142, 375/150, 375/267, 375/347, 375/349, 375/147, 375/316, 370/335, 370/342, 370/320, 370/310, 370/487, 370/490
• US Class Current: 375/147
• CPC Class Codes: H04B 1/7115 Constructive combining of multi-path signals, i.e. RAKE receivers
• CPC Class Codes: H04B 1/7117 Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
• CPC Class Codes: H04B 2201/70703 using multiple or variable rates
• CPC Class Codes: H04B 2201/70707 Efficiency-related aspects

Abstract

The present invention provides a CDMA receiving apparatus capable of corresponding to the service types of data and system conditions flexibly and efficiently, so as to achieve such processing for electric power control, diversity control and the like, requested to have real-time property. A CDMA signal inputted into a memory is searched by searcher units of each reception processing block. Voice data and low-speed data are demodulated immediately by a finger unit for data field and a finger unit for control field, and combined by RAKE-combining units. Data fields of packet data and high-speed data are accumulated in memories for data field and demodulated by finger units for data field successively based on path information stored in memories for path information.

Claims

1. A code division multiple access (CDMA) receiving apparatus for receiving data of a plurality of service types, which comprises

a plurality of reception processing blocks for carrying out reception processing for said data;

a decoder for decoding a received signal outputted from said plurality of said reception processing blocks via a memory of a plurality of memories; and

the plurality of memories, wherein each memory is connected between said decoder and a first RAKE combiner and a second RAKE combiner in each of the plurality of reception processing blocks;

wherein said data are allocated to said reception processing blocks, depending upon said service types;

wherein said service types of data include packet data, high-speed data, voice data, and low-speed data; and

wherein said decoder reads out received signals having a high priority based on the service type of the received signals successively from said memories so as to carry out decoding processing.

2. A code division multiple access (CDMA) receiving method for receiving data of a plurality of service types, which comprises the steps of:

storing received CDMA data signal;

allocating said received CDMA signal to one of a plurality of reception processing blocks, depending on the service type;

storing a received signal in one of a plurality of memories, wherein each of the plurality of memories is connected between a decoder and a first RAKE combiner and a second RAKE combiner in each reception processing block,

reading out received signals having a high priority based on the service type of the received signals successively from said memories; and

decoding said received signals read out from said memories;

wherein said service types of data include at least packet data, high-speed data, voice data, and low-speed data.