Chapter 2 Coding , Modulation , and Multiple - Access
نویسنده
چکیده
This chapter of the report focuses on coding, modulation, and multiple-access techniques for wireless communications. To put the discussion in perspective, a short background on the development of wireless communication systems, focusing mainly on cellular systems is provided. The following sections discuss coding and modulation and various modulation techniques; present a comparative analysis of research and development in Europe, Japan, and the United States; and, finally, make recommendations for further research in wireless communications.
منابع مشابه
Long non-coding RNAs and their significance in human diseases
Protein-coding genes account for only a small fraction of the human genome and most of the genomic sequences are transcriptionally silent, but recent observations indicate significant functional elements, including non-coding protein transcripts in the human genome. Long non-coding RNAs (lncRNAs) have been defined as transcripts of >200 nucleotides without protein-coding capacity that perform t...
متن کاملBounds for Multiple-Access Relay Channels with Feedback via Two-way Relay Channel
In this study, we introduce a new two-way relay channel and obtain an inner bound and an outer bound for the discrete and memoryless multiple access relay channels with receiver-source feedback via two-way relay channel in which end nodes exchange signals by a relay node. And we extend these results to the Gaussian case. By numerical computing, we show that our inner bound is the same with o...
متن کاملPerformance Improvement of DS-CDMA Wireless Communication Network with Convolutionally Encoded OQPSK Modulation Scheme
This paper considers the bit error probability analysis of Direct-Sequence Code-Division Multiple Access (DS-CDMA) system. A statistical characterization of the decision variable at transmitter and receiver is obtained. System is simulated with OQPSK modulation scheme which when compared with conventional Binary Phase Shift Keying (BPSK) gives improved performance in terms of Probability of Err...
متن کاملMeasurement-based Performance Evaluation of WiMAX and HSDPA
In this work, a realistic physical layer performance evaluation of High Speed Downlink Packet Access (HSDPA) as well as IEEE 802.16-2004, commonly referred to as Worldwide Inter-operability for Microwave Access (WiMAX), is provided. The performance evaluation is carried out in two measurement campaigns that took place in an alpine and an urban environment. Both, WiMAX and HSDPA use adaptive mod...
متن کاملAdaptive Modulation and Rate Coding Multi Carrier Code Division Multiple Access Technique for 4g Mobile Communication Systems
Future mobile communication requires 100 Mbps data rate, video and audio streaming, asymmetric, multiple access, adaptive modulation and code rate, dynamic packet arrangement, adaptive antenna and IPv6 utilization facility to enhance lossless communication. We propose an Adaptive Modulation and Rate Coding Multi Carrier Code Division Multiple Access (AMRC-MC-CDMA) technique is a promising way t...
متن کامل