Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Hybrid Automatic Repeat reQuest"”.
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New hybrid automatic repeat request (HARQ) combining with space time block coding (STBC) in invariant and variant fading channel
Hybrid Automatic Repeat reQuest (HARQ) combining for space time block coding Multiple Input Multiple Output (MIMO) system consisting of N transmit antennas and M receive antennas (NxM) in a time invariant channel and in a time varying channel is proposed and its performance is analyzed. Based on …
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New hybrid automatic repeat request (HARQ) scheme for 4x4 MIMO system, based on the extended alamouti quasi-orthogonal space-time bloc coding (Q-STBC), in invariant and variant fading channel
A new Hybrid Automatic Repeat reQuest (HARQ) combining scheme for a 4x4 Multiple Input Multiple Output (MIMO) system in invariant and variant fading channel conditions is proposed and analized. Based on the Extended Alamouti Quasi-orthogonal Space-Time Block Coding (Q-STBC), the use of the …
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Retransmission strategies for moving networks over ricean fading channels
… of designing retransmission protocols based on Hybrid Automatic Repeat reQuest (HARQ) for moving networks over Ricean fading channels has been considered. The scenario of interest consists of one receiver traveling at a given speed while connected to a wireless network based on OFDM (e.g., …
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Implementation and evaluation of various stop and wait type II hybrid ARQ schemes for mobile radio
… of various Stop-and-Wait (SW) Type II Hybrid Automatic Repeat reQuest(ARQ) strategies. The modulation scheme utilized is the North American digital cellular standard known as 7r/4—shift DQPSK. The general Complementary Punctured Convolutional (CPC) SW Type II ARQ scheme is presented and …
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Rateless and rateless unequal error protection codes for Gaussian channels
… using a rateless code to two different forms of hybrid automatic repeat request (HARQ), namely Chase combining HARQ and incremental redundancy HARQ. We find that the rateless codes compare favorably to both forms of HARQ. In addition, we develop a code that has both rateless and unequal error …
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Fountain codes for the wireless Internet
… four receive antennas is proposed. Finally, A Hybrid Automatic Repeat reQuest (H-ARQ) SLT coded modulation scheme is designed in this thesis, where SLT codes are used both for correcting erroneous bits and for detecting as well as retransmitting erroneous Internet Protocol (IP) based packets. …
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Non-orthogonal random waveform based multiuser communications
… Chapter 4 and they are combined with a practical Hybrid Automatic Repeat reQuest (HARQ) system in Chapter 5.<br/>In the cellular system scenario presented in Chapter 3, we discuss three design tradeoffs ofMulti-Carrier Interleave Division Multiple Access (MC-IDMA) with the aid of EXtrinsic …
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Cloud-aided wireless systems: communications and radar applications
… the BBU, is then studied for implementation of Hybrid Automatic Repeat Request (HARQ) protocols. Specifically, two novel solutions are proposed, which are based on the control-data separation architecture. The trade-offs involving resources such as the number of transmitting and receiving …
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Design of single-carrier frequency domain equalization (SC-FDE) with transmit diversity for wireless and optical communications
… sections. In the first part, a physical layer hybrid automatic repeat request (HARQ) system that combines the advantages of the SC-FDE and transmit diversity on the uplink of wireless communication is presented. The proposed technique can achieve high throughput and high spectral efficiency in …
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Delay QoS Provisioning and Optimal Resource Allocation for Wireless Networks
… throughput and energy efficiency analysis for hybrid automatic repeat request (HARQ) protocols are conducted under QoS constraints. Approximations are employed for small QoS exponent values in order to obtain closed-form expressions for the throughput and energy efficiency metrics. Also, the …