US 2003/0117989 A1Published application

Demodulating device and method for W-CDMA base station

AssigneeElectronics and Telecommunication Research Institute

InventorKwang Soon Kim

Life of this patent

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Abstract

A demodulator of a W-CDMA base station comprises: a chip calculator for de-spreading signals received through sectors including antennas; a symbol calculator for using symbols of a control channel and a data channel from the de-spread signals, estimating a channel, and combining signals input through a multi-path; a frame calculator for combining the combined signals to perform transport format combination indicator decoding, feedback information decoding, frame sync estimation, SNR estimation, post-combining, and second de-interleaving; a storage unit for storing outputs of the chip calculator, symbol calculator, and frame calculator; a storage unit controller for controlling inputs/outputs between the chip calculator, symbol calculator, frame calculator, and storage unit; and a host interface for controlling inputs/outputs between the chip calculator, symbol calculator, frame calculator, and host.

Claims16

Dependent claims

A demodulator of a wideband code division access (W-CDMA) system base station comprising:

a chip calculator for receiving signals through a plurality of sectors each of which includes a plurality of antennas, and de-spreading the received signals;
a symbol calculator for selectively using symbols of a control channel and a data channel from the signals de-spread by the chip calculator, estimating a channel, and combining the signals input through a multi-path;
a frame calculator for combining the signals combined by the symbol calculator for each frame to perform transport format combination indicator (TFCI) decoding, feedback information (FBI) decoding, frame sync estimation, signal to noise ratio (SNR) estimation, and post-combining and second de-interleaving calculation;
a storage unit for storing output values of the chip calculator, the symbol calculator, and the frame calculator;
a storage unit controller for controlling input/output signals between the chip calculator, the symbol calculator, the frame calculator, and the storage unit;
and
a host interface for controlling input/output signals between the chip calculator, the symbol calculator, the frame calculator, and a host.

4 more elements

A demodulation method of a W-CDMA base station comprising:

(a) receiving signals from a plurality of sectors each of which includes a plurality of antennas, and de-spreading the received signals at a finger unit that is dynamically allocated to each user;
(b) selectively using symbols of a control channel and a data channel from the de-spread signals to estimate a channel, and using a value obtained by channel estimation to combine signals input through a multi-path;
and
(c) classifying the combined signals according to at least one condition of time delay and reliability conditions, and performing TFCI decoding, FBI decoding, frame sync estimation, SNR estimation, post-combining, and second de-interleaving.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 10/147,974Filed 20 May 2002
Priority: KR 2001-8444324 Dec 2001
Published: 26 Jun 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04B 1/7115
The interference being multi-path interference: constructive combining of multi-path signals, i.e. RAKE receivers
H04B 1/7117
Constructive combining of multi-path signals, i.e. RAKE receivers: selection, re-selection, allocation or re-allocation of paths to fingers, e.g.…
H04B 2201/70701
Relating to direct sequence modulation: featuring pilot assisted reception
H04B 2201/70702
Relating to direct sequence modulation: intercell-related aspects