Title: Apparatus and method for improved performance in MC-CDMA radio telecommunication systems that use pulse-shaping filters
Application Number: 03817866 Application Date: 2003.07.24
Publication Number: 1672349 Publication Date: 2005.09.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04B15/00,H04K1/00,H04L27/30
Applicant(s) Name: Nokia Corp. Address:
Inventor(s) Name: Borran Mohammed J., Varshney Prabodh, Vilpponen Ha
Attorney & Agent: li yafei liu jie
Abstract:
     An apparatus for use in a multi-carrier code division muti-carrier code division multiple access telecommunication network (Fig. 1) comprising a transmitter for transmitting a radio signal. The transmitter comprises an orthogonal frequency division multiplexing modulator (425) that divides an input vector into two parts, inserts N zeroes between them and takes an inverse fast Fourier transform to obtain a time domain signal. A pulse shaping filter (430) coupled to the modulator (425) for processing the time domain signal prior to transmission. A receiver (451) for receiving the transmitted signal. The receiver (451) comprises an OFDM demodulator (460) for taking a FFT of the signal and removes the zeroes inserted in the transmitter from the resulting frequency domain signal.
Time: 10