Farssi Sidi Mohamed

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The UMTS network is complementary to GSM and GPRS. The GSM network covers the features required for voice-type services in a circuit mode, the network brings GFPRS the first features to the introduction of services such as packet data, and UMTS networks complement these by offering voice and data services on an additional packet. UMTS is thus an extension(More)
––OFDM is a modulation technique which allows not only to increase more the bit rates of SISO or MIMO systems but also to fight against the multipath phenomena of the mobile radio channel due to its frequency and temporal selectivityby transforming it in a set of sub-channels not selective for frequencies. To benefit of these advantages that it offers, we(More)
In this paper, we propose a radio mobile access technique which combines OFDM and CDMA advantages in a multipath environment. It is a synchronous multiuser M-QAM OFDM transmission system with the spreading of OFDM symbols. The chosen spreading codes are OVSF codes. The targeted objective is to be able to evaluate the performance of such an approach in(More)
IMS is well integrated with existing voice and data networks, while adopting many of their key characteristics. The Call Session Control Functions (CSCFs) servers are the key part of the IMS structure. They are the main components responsible for processing and routing signalling messages. When CSCFs servers (P-CSCF, I-CSCF, S-CSCF) are running on the same(More)
In this paper, we have analysed the received signal without multipath at Additive White Gaussian Noise (AWGN) with a Signal to Noise Ratio (SNR) per sample, 10 dB, 8 dB, 6 dB and 4 dB respectively. We present the received signal with a multipath channel with noisy, the signal to noise ratio of 6 dB is studied and a multipath channel noiseless. And doing(More)
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