The applications of the general formulae of channel capacity developed in the quantum information theory to evaluation of information transmission capacity of optical channel are interesting subjects. In this review paper, we will point out that the formulation based on only classicalquantum channel mapping model may be inadequate when one takes into account a power constraint for noisy channel...

Multiple input multiple output (MIMO) systems using multiple transmit and receive antennas are widely recognized as the vital breakthrough that will allow future wireless systems to achieve higher data rates with limited bandwidth and power resources. However, the capacity benefits of MIMO systems depend strongly on how well the channel can be tracked at the transmitter and the receiver; whethe...

We generalize the Gel’fand-Pinsker model with the setup of a memoryless multiple-access channel where there is a single message source fed to both encoders. Only one of the encoders knows the state of the channel (non-causally), which is also unknown to the receiver. We find an explicit characterization of the capacity of this single-user channel. An explicit characterization of the capacity is...

In this paper, the individual secrecy of two-way wiretap channel is investigated, where two legitimate users’ messages are separately guaranteed secure against an external eavesdropper. For one thing, in some communication scenarios, the joint secrecy is impossible to achieve both positive secrecy rates of two users. For another, the individual secrecy satisfies the secrecy demand of many pract...

We consider a state-dependent full-duplex relay channel with the channel states available non-causally at only the source, i.e., neither at the relay nor at the destination. For the discrete memoryless (DM) case, we establish lower and upper bounds on the channel capacity. The lower bound is obtained by a coding scheme at the source that uses a Gel’fand-Pinsker like binning scheme at the source...

We study the capacity of Nakagami multipath fading (NMF) channels with an average power constraint for three power and rate adaptation policies. We obtain closed-form solutions for NMF channel capacity (with and without diversity) for each power and rate adaptation strategy, and compare them with the additive white Gaussian noise (AWGN) channel capacity. The capacity of a NMF channel is always ...

We derive the two-user capacity region with and without common information for a Gaussian broadcast channel with intersymbol interference, assuming colored Gaussian noise and an input power constraint. The proof is achieved by rst deening a similar channel model, the circular broadcast channel, which can be decomposed into a set of parallel degraded broadcast channels. The capacity region for p...

This paper considers the cognitive interference channel (CIC) with two transmitters and two receivers, in which the cognitive transmitter non-causally knows the message and codeword of the primary transmitter. We first introduce a discrete memoryless more capable CIC, which is an extension to the more capable broadcast channel (BC). Using superposition coding, we propose an inner bound and an o...

This paper considers the channel capacity of 60GHz wireless communications systems over Rayleigh fading channels and Ricean fading channels. The SNR and therefore capacity varies according to the communication distance. The capacity is presented for line-of-sight (LOS) and non-line-of-sight (NLOS) channels given based on a 60GHz link budget model. Phase shift keying (PSK) modulation is consider...