'Mc cdma' diaporamas de présentation

Multiple Access Techniques

Multiple Access Techniques. 2007.10 ??? / ??????. ???????. ??. Multiple Access Techniques Contentionless Multiple Access Contention Multiple Access Hanging Multiple Access MAC Issues MAC Design Issues MAC Layer Issues Technology Trends What is 4G ? Evolution Paths to 4G.

1.26k views • 69 slides

DIGITAL SPREAD SPECTRUM SYSTEMS

DIGITAL SPREAD SPECTRUM SYSTEMS. ENG-737 Lecture 9. Wright State University James P. Stephens. MULTIPATH SCENARIO. TYPES OF FADING DUE TO MULTIPATH. Multipath - Delay Spread Flat Frequency selective Doppler (Frequency Dispersion) Fast Slow What is Coherence BW?

690 views • 40 slides

SISTEMI DI RADIOCOMUNICAZIONE

SISTEMI DI RADIOCOMUNICAZIONE. MULTI-CARRIER CDMA DIGITAL COMMUNICATION SYSTEMS. Prof. C. Regazzoni. References. [1] N. Yee, J.P. Linnartz, “Multi-Carrier CDMA in an Indoor Wireless Radio Channel”, Tech. Rep. Of University of California at Berkeley, 1994.

512 views • 35 slides

Multi-carrier CDMA Digital Communication Systems

711 views • 35 slides

OFDM-CDMA

OFDM-CDMA. Outline. OFDM-CDMA - Introduction OFDM-CDMA system Conceptual Implementation Coding PAPR in OFDM-CDMA Systems Multi-antenna OFDM-CDMA Comparison with Other Technologies OFDM-CDMA vs. MC-CDMA OFDM-CDMA vs. MC-DS-CDMA Conclusion References. Introduction.

1.32k views • 30 slides

ENABLING TECHNOLOGIES FOR 4G NETWORKS

ENABLING TECHNOLOGIES FOR 4G NETWORKS. BY ADEL AL-SHAHRANI 986074 June 3, 2003. OUTLINE. WHY 4G NETWORK LAYER TECHNOLOGIES Network Architectures MIPv6 & HMIPv6 IDMP PHYSICAL LAYER TECHNOLOGIES SDR OFDM M-Ary MC-CDMA CONCLUSION. WHY 4G?. 1G Analogy Communication

434 views • 29 slides

MC-CDMA systems for wireless networks

MC-CDMA systems for wireless networks. OUTLINE. Introduction Basic multiple access techniques Evolution of MC-CDMA Technologies in MC-CDMA Applications of MC-CDMA Advantages and problems of MC-CDMA Key challenges and issues of MC-CDMA. INTRODUCTION

591 views • 27 slides

Toward MIMO MC-CDMA

Toward MIMO MC-CDMA. Speaker : Pei-Yun Tsai Advisor : Tzi-Dar Chiueh 2004/10/25. Outline. Motivation MIMO MC-CDMA transmitter Allocation of system resource STBC+MC-CDMA V-BLAST+MC-CDMA MIMO MC-CDMA receiver Synchronization Channel estimation MIMO decoding Conclusion. Motivation.

536 views • 26 slides

MC-CDMA vs DS-CDMA M. des Noes and D. Ktenas (presented by Sylvie Mayrargue)

MC-CDMA vs DS-CDMA M. des Noes and D. Ktenas (presented by Sylvie Mayrargue). Outline. Context of the comparison : Simulation assumptions Asymptotic analysis DS and MC-CDMA system models. For each detector : Linear filter description Simulation results Interpretation

444 views • 25 slides

Spectral Efficiency of MC-CDMA: Linear and Non-Linear Receivers Aditya Gupta 11/05/2209

Spectral Efficiency of MC-CDMA: Linear and Non-Linear Receivers Aditya Gupta 11/05/2209. Purpose. Analyzes the spectral efficiency Randomly-spread synchronous multicarrier code-division multiple-access (MCCDMA) channel subject

349 views • 21 slides

Sensitivity of MC-CDMA Access Scheme to Carrier Phase Noise and Frequency offset

Sensitivity of MC-CDMA Access Scheme to Carrier Phase Noise and Frequency offset. ?? : ??? ???? : ???. outline. Introduction System analysis Simulation Conclusion. The performance loss of an MC-CDMA system. Nonlinear amplifier Phase noise Frequency offset of the RF oscillator

306 views • 16 slides

Wideband Communications

Wideband Communications . Lecture 20-23: MC-CDMA Aliazam Abbasfar. Outline. IS-95/ WCDMA MC-DS-CDMA MC-CDMA OFDMA. IS-95. DSSS 1.2288 Mchips /sec ( BW = 1.25 MHz) FDD Downlink Synchronous CDMA Quadrature spreading 2 Extended M-seq. (2 15 -chip long)

320 views • 15 slides

Multi carrier-CDMA

Multi carrier-CDMA. ???? : ??? ?? : ???. outline. Advantage of OFDM Disadvantage of OFDM Advantage of DS-CDMA Disadvantage of CDMA What is MC-CDMA Conclusion. Advantage of OFDM. OFDM is robust to frequency-selective fading.

415 views • 14 slides

Research highlights

Research highlights. Framework for Traffic Analysis in Wireless Networks, first exact solution for outage in cellular networks 1 st paper on MC-CDMA ICI mitigation in mobile OFDM New Attacks on Watermarking Detection theory applied to watermarking Privacy in Biometrics.

280 views • 10 slides

??? ???? ?????? ??????

??? ???? ?????? ??????. Classification of CDMA. CDMA. Hybrid CDMA. Pure CDMA. DS/FH. DS. FH. TH. MC-CDMA. DS/TH. TDMA/CDMA. FH/TH. MT-CDMA. DS/FH/TH. Fast. Slow. Narrow band. Wide band. Frequency. Frequency. Hopping. Hopping.

524 views • 9 slides

Armin Dammann, Stephan Sand Barcelona, March 9-10, 2005

NEWCOM DLR Research Topics and Activities. Armin Dammann, Stephan Sand Barcelona, March 9-10, 2005. German Aerospace Center (DLR) The national aerospace research center and space agency. DLR Research Center Oberpfaffenhofen Institute of Radio Frequency Technology and Radar Systems

200 views • 7 slides