Multiple Active Antenna –Spatial Modulation (MA-SM) is a high rate, low complexity MIMO transmission scheme. It takes the advantage of low complexity of SM and high multiplexing gain of V-BLAST system. Here, the information bits are conveyed by both the constellation symbol and spatial symbol. To benefit the available multiplexing gain, active antennas could be any number not more than the numb...

We present the first traitor tracing scheme with efficient black-box traitor tracing in which the ratio of the ciphertext and plaintext lengths (the transmission rate) is asymptotically 1, which is optimal. Previous constructions in this setting either obtained constant (but not optimal) transmission rate [KY02b], or did not support black-box tracing [CPP05]. Our treatment improves the standard...

In this paper, we summarize some eecient techniques and methods which have been developed for high rate multi-media wireless communications. The overall structure of a wireless cellular system which provides integrated services is proposed. Spread spectrum DS-CDMA and modiied ATM techniques are chosen to support the system. Ef-cient signalling and error control coding methods are investigated. ...

A modulation system is proposed that continuously adjusts its data rate in response to signal strength variations in a fading channel. The optimum variation of data rate with channel conditions is determined, and includes the effects of feedback channel time delay, the interval between rate changes, and restriction of the number of allowable rates. Application of these results to a full duplex ...

An important open problem in the area of Traitor Tracing is designing a scheme with constant expansion of the size of keys (users’ keys and the encryption key) and of the size of ciphertexts with respect to the size of the plaintext. This problem is known from the introduction of Traitor Tracing by Chor, Fiat and Naor. We refer to such schemes as traitor tracing with constant transmission rate....

| This paper presents bandwidth-eecient speech transmission systems using rate-compatible channel coders and variable bitrate embedded source coders. Rate-compatible punctured convolutional codes (RCPC) are often used to provide unequal error protection (UEP) via progressive bit puncturing. RCPC codes are well suited for constellations for which Euclidean distance and Ham-ming distance are equi...

In this report, we investigate the data transmission model in which a sequence of data is broadcasted to a number of receivers. The receivers, which have different channel capacities, wish to decode the data sequentially at different rates. Our results are applicable to a wide range of scenarios. For instance, it can be employed in the broadcast streaming of a video clip through the internet, s...