20120928 dual alamouti codes
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1) The document proposes dual Alamouti codes, which allow for full diversity in point-to-point MIMO systems using only channel state information at the transmitter without needing channel state information at the receiver. 2) It constructs dual Alamouti codes from the original Alamouti codes and describes maximum likelihood decoding without CSIR. 3) Simulation results show the original and dual Alamouti codes have the same performance for PSK but dual codes provide array gain for QAM.
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Increase Rate of Indonesia's Published Papers through Indonesian Student Part...
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SSAPL is a company incorporated in 1994 that provides call center, back-office, and medical transcription services through its subsidiaries ChoiceConnex, Infovision Software, and T-South Inc. ChoiceConnex is its call center division with facilities in Mumbai, Kolkata, and the US. It provides both voice and non-voice based services to clients in several countries. The company focuses on quality and security certification and has robust training and infrastructure to deliver world-class customer service.
My nepali songs approved by radio nepal 1990 92
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1 my bio-data - raj k pandey as of march 2011
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A study of indonesia's current condition to increase number of published papers
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Bz25454457
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บทที่4 หลักการแนวคิดในการสื่อสาร
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Lte course
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20120928 dual alamouti codes
- 1. Wireless Embedded & Networking System Laboratory Dual Alamouti Codes Liangbin Li, Hamid Jafarkhani Globecom 2011 Proceedings Thomhert Suprapto Siadari Dept. IT Convergence Kumoh National Institute of Technology Oct 26th , 2012
- 2. Refinements on IEEE 802.11 Distributed Coordination Function Modeling Approaches (Oct 28, 2011) Low-overhead Uplink Scheduling Through Load Prediction for WiMAX real-time services (Feb 3, 2012) Performance Analysis of Contention Based Bandwidth Request Mechanisms in WiMAX Networks (Mar 23, 2012) DOC ID
- 3. Problems & Solutions Introduction & Assumptions Duality of ZF Design Dual Alamouti Codes Simulation Results Conclusion Weakness/Future Works DOC ID
- 4. Problems: - Alamouti codes perfect Channel State Information at Receiver (CSIR) only - Complete communication two training sequences are needed - TDD forward and reverse channel coefficients are the same due to reciprocity Motivations: reducing the twice training sequences in complete communication Solutions: designing point-to-point MIMO system with only CSIT and no CSIR, dual Alamouti codes to obtain full diversity DOC ID
- 5. Alamouti codes full diversity performance Assumptions No CSIR M x 2 MIMO systems TDD system AWGN Only CSIT QPSK, QAM modulation DOC ID
- 6. 1st system 1 x n input, 1 x m output P = power J = max streams n = noise SNR = Signal to Noise Ratio 2nd system 1 x m input, 1 x n output Z/F = channel s/x = signal 1) The first system uses u l and v as transmit and receive filters, respectively. l 2) The second system uses v and u as transmit and receive filters, respectively. * l * l 3) Both systems have the same power constraint P. 4) The channel matrices are related by F Z* 5) The filters and satisfy ZF relationship 2nd system Dual system DOC ID
- 7. A. Construction from the original Alamouti Codes - 2 x 2 Alamouti codes (s1 and s2) - Negative conjugates in receiver Descriptions P = power G = fading channels V = receive filters R = real - Dual system I = Imaginer DOC ID
- 8. B. ML decoding - 2 x M transmitted matrix - Receive signal at Antenna j - Without CSIR, the receiver decouples s1 and s2: DOC ID
- 9. - SNR, diversity, symbol rate, and decoding complexity Parameter Original Alamouti Dual Alamouti SNR The same The same Diversity 2M 2M Symbol rate rate-one symbols Rate-one symbols Decoding Needs decoding Needs decoding complexity DOC ID
- 10. DOC ID
- 11. DOC ID
- 12. Conclusions - Dual alamouti only with CSIT - The receiver could operate without CSIR - PSK Alamouti and Dual alamouti have the same performance - QAM Dual alamouti codes provide substantial array gain improvement Weakness & Future Plan - Need feedback decision for transmitter - The simulation only covers 2x2 MIMO DOC ID
- 13. DOC ID
Editor's Notes
- To day, I’d like deliver my presentation about paper titled blaThe authors areIE
- My outline today is:
- Complete communication is UL dan DL commReciprocity is ? KeadaandimanaFull diversity here is? With their opinion?CSI? Apaguna CSI?
- ApafungsiAlamouti codes here?Efekdari no CSIR?Efekgaada CSIT?Block fading? Gimanakaloyg lain? Kenapaharuspakeini?CSI This information describes how a signal propagates from the transmitter to the receiver and represents the combined effect of, for example, scattering, fading, and power decay with distance. The CSI makes it possible to adapt transmissions to current channel conditions, which is crucial for achieving reliable communication with high data rates in multiantenna systems.CSI needs to be estimated at the receiver and usually quantized and fed back to the transmitter (although reverse-link estimation is possible in TDD systems). Therefore, the transmitter and receiver can have different CSI. The CSI at the transmitter and the CSI at the receiver are sometimes referred to as CSIT and CSIR, respectively.
- Posisi dual system ini? Apakah 1 terus 2 atau 1 dan 2paralel
- Using beamforming MISO with only CSITThere is no method of beamforming to achieve full diversity for a blind multi-antenna receivers