This paper describes ongoing research preparing for the widespread deployment of spoken language processing in networks encompassing wired and wireless transmission channels. The paper gives a brief overview of the standardized bit-error protection scheme aimed at minimising channel transmission errors and used within the distributed speech recognition (DSR) paradigm. Within the ETSI-DSR standa...

in this paper, we propose space-time block codes based on constituent intersectant orthogonal designs. after channel model is formulated, we studied the space-time block codes from constituent intersectant orthogonal designs. at last we made simulations for the space-time block codes from complex orthogonal design and the space-time block codes from constituent intersectant orthogonal design to...

This paper describes ongoing research preparing for the widespread deployment of spoken language processing in networks encompassing wired and wireless transmission channels. The paper gives a brief overview of the standardized bit-error protection scheme aimed at minimising channel transmission errors and used within the distributed speech recognition (DSR) paradigm. Within the ETSI-DSR standa...

In the wireless data communication the signals present in the transmission environment interfere with the communicating signals causing an undesired signal reception. This may further cause processing of wrong data. So the transmission error sensitive communication systems are always in need of an efficient encoder and decoder hardware interface that are capable of error detection and correctio...

time reversal (tir) technique is an effective and simple method for data transmission in extremely multipath indoor uwb channels that mitigates the complexity of receiver by its own time focusing feature. although, tir method has the suitable performance, but it is sensitive to the non-ideal channel estimation error. in this paper at first, the bit error probability of tir-uwb communication sys...

In this paper we analyze the TCP performance degradation introduced by a wireless media having transmission errors and the capability of the following mechanisms to correct it (i) improvements over the TCP Reno release (SACK, New-Reno and FACK); (ii) improvements over the classical “tail dropping” mechanism used by routers (RED and ECN); and (iii) a TCP implementation based on the usage of ECN ...

In a frequency-selective fading channel, the transmission performance of single-carrier (SC) transmission significantly degrades due to severe inter-symbol-interference (ISI). In this paper, the joint use of space-time transmit diversity (STTD), receive antenna diversity and frequency-domain minimum mean square error (MMSE) equalization in SC transmission is studied. Space-time encoding and dec...

In this paper, improved performance scheme for joint transmission(JT) is proposed in downlink(DL) coordinated multi-point(CoMP) in case of the constraint transmission power. This scheme is that a serving transmission point(TP) requests the JT to an inter-TP and it selects a precoding technique according to the channel state information(CSI) from user equipment(UE). The simulation results show t...