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Estimating method and equipment for wideband code division multiple access transmitting speed rate

A wideband code division multiple access and transmission rate technology, applied in code division multiplexing systems, data rate detection devices, other decoding technologies, etc., can solve problems such as prolonged processing time and estimation errors

Inactive Publication Date: 2004-09-29
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This processing time is extended because a CRC check is required until the transmission rate estimation is completed
In addition, if the CRC check fails, there may be an estimation error

Method used

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  • Estimating method and equipment for wideband code division multiple access transmitting speed rate
  • Estimating method and equipment for wideband code division multiple access transmitting speed rate
  • Estimating method and equipment for wideband code division multiple access transmitting speed rate

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Embodiment Construction

[0022] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0023] figure 1 To show a transmission processing section on a transmission channel in a general W-CDMA system using a W-CDMA transmission rate estimating apparatus of an embodiment of the present invention. figure 2 To show the reception processing part on the transmission channel in the general W-CDMA system.

[0024] figure 1 The shown configuration includes encoders 2A to 2C that perform transmission processing for three services, ie, respective transport channels (TrCH). The encoder on each transport channel performs the following operations.

[0025] First, in the encoder 2A corresponding to TrCH#1, a CRC adding section 21 adds CRC for error checking to the data block 1A transmitted from the upper layer, while the convolutional encoding section 22 performs error correction encoding, In this case convolutional coding. The rate adjustment section 23 redu...

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Abstract

In a W-CDMA transmission rate estimation method, a maximum likelihood transport format combination is selected from a plurality of transport format combinations representing bit length combinations constituting a plurality of transport channels, each having a variable bit length, on the basis of correlation strengths between a normal encoded bit string and bit strings of data obtained by performing Viterbi decoding processing for data, of a reception output constituted by the respective transport channels, which corresponds to an arbitrary transport channel. A data transmission rate is then estimated on the basis of the selected combination. A W-CDMA transmission rate estimation device is also disclosed.

Description

technical field [0001] The present invention relates to wideband code division multiple access (W-CDMA) transmission rate estimation method and equipment, in particular to a W-CDMA transmission rate estimation method and equipment for estimating transmission rate using path metrics obtained in Viterbi decoding processing. Background technique [0002] A scheme for the IMT2000 W-CDMA system has been studied in 3GPP. W-CDMA requires several parameters to achieve the figure 1 and 2 Send processing in and general functionality in receive processing. In W-CDMA etc., where data with different transmission rates are concentrated and transmitted, a parameter called bit length is particularly important for almost all functions. [0003] As a function of notifying the receiving side of the bit length, a technique of transmitting information data called TFCI (Transport Format Combination Identifier) ​​has been studied (for example, Reference 1: Multiplexing and Channel Coding, 3G T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/10H03M13/41H04J13/00H04L25/02
CPCH04L25/0262H04B2201/70705H04B1/707H04W28/22H04W28/10H04B7/26
Inventor 佐藤毅
Owner NEC CORP
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