Differential Space-Time Coding Scheme Using Star Quadrature Amplitude Modulation Method

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Differential Space-Time Coding Scheme Using Star Quadrature Amplitude Modulation Method

Differential space-time coding (DSTC) has receivedmuch interest as it obviates the requirement of the channel state information at the receiver while maintaining the desired properties of space-time coding techniques. In this paper, by introducing star quadrature amplitude modulation (star QAM) method, two kinds of multiple amplitudes DSTC schemes are proposed. One is based on differential unit...

متن کامل

Quadrature Amplitude Modulation

The simplest type of digital modulation involves transmitting a sequence of waveforms (“symbols”) si(t) of equal durationT where eachwaveform is chosen independently from a set of M. This allows us to transmit up to b = log2(M) bits per symbol. A common sets of such symbols are those where the real and imaginary parts of the complex baseband signal are each modulated in amplitude. This known as...

متن کامل

Combined CELP Speech Coding and Quadrature Amplitude Modulation

In this paper, a method for optimizing the index map between the output indices of a wideband (7 kHz) CELP speech coder and the channel symbols for a power constrained channel and multilevel signaling is presented. The method is based on simulated annealing and makes use of dynamic scaling of a QAM signal constellation during the optimization procedure in order to optimize for a fixed transmitt...

متن کامل

Noisy Index Coding with Quadrature Amplitude Modulation (QAM)

This paper discusses noisy index coding problem over Gaussian broadcast channel. We propose a technique for mapping the index coded bits to M-QAM symbols such that the receivers whose side information satisfies certain conditions get coding gain, which we call the QAM side information coding gain. We compare this with the PSK side information coding gain, which was discussed in [1]. Keywords—In...

متن کامل

Differential space-time modulation - coding and capacity results

In this paper, powerful coding techniques for differential space-time modulation (DSTM) over Rayleigh flat fading channels and noncoherent demodulation without channel state information at the receiver are investigated. In particular, multilevel coding (MLC), bit-interleaved coded modulation (BICM), and so-called hybrid coded modulation (HCM) are devised and compared using capacity arguments. F...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: EURASIP Journal on Advances in Signal Processing

سال: 2006

ISSN: 1687-6172,1687-6180

DOI: 10.1155/asp/2006/89849