The problem of hiding data routes in a wireless network from eavesdroppers is considered. Using Shannon’s equivocation as a measure of anonymity of routes, scheduling and relaying protocols are designed to guarantee anonymity. A duality of this problem to information-theoretic rate-distortion is used to maximize network throughput for any specified level of anonymity. The achievability of this ...

TCP flows generated by applications such as the Web or FTP require a minimum network throughput and can also benefit from an extra throughput due to their rate-adaptive algorithms. To build a guaranteed minimum throughput service, the authors propose a scheme with Admission Control (AC) using a small set of packet classes in a core-stateless network. At the ingress of the network, each flow pac...

IEEE 802.11 is the most important standard for wireless local area networks (WLANS). This paper presents a performance evaluation of IEEE 802.11 Distributed Coordination Function (DCF) in a multi-rate WLAN. We studied how throughput and delay varies with the distance of transmission in a multi-rate WLAN and the result was used to compare that of single rate WLAN. From the analysis it was observ...

—A burst-mode clock recovery circuit with a novel dual bit-rate structure is presented. It utilizes two gated-oscillators to align clock with data edges and can operate in half-rate clocking mode, doubling data throughput, as well as in full-rate clocking mode. The gated-oscillator reset-phase control scheme causes the starting phase of gated-oscillators to alternate repeatedly between 0° and 1...

We describe various multimedia applications that demand a fast approximate text search. Each application requires a specific method of implementing the approximate text search. We present important algorithms and implementation methods and their characteristics concerning throughput rate and flexibility. A text processor with a very high text throughput rate has been fabricated for hardwareacce...

In this paper we evaluate the performance of LTE-Downlink System with different Transmit diversity and Spatial multiplexing MIMO modes in LTE-downlink. Here we analysis performance on BLER-Block Error Rate and Data Throughput vs SNR-Signal to Noise Ratio. Two Transmit Diversity schemes Space Frequency Block Codes (SFBC) and Frequency Switched Transmit Diversity (FSTD) and two Spatial Multiplexi...

This paper proposes a scheduling and adaptive rate control scheme for multi-user multiple-input multiple-output (MIMO) systems in the uplink, designed to improve system throughput in single-carrier broadband wireless systems with a turbo equalizer. In the proposed scheme, to reduce computational burden for the scheduling and adaptive rate control, scheduling including stream selection is first ...

The retransmission cut-off is not needed for a stable operation of slotted ALOHA if the new packet generation rate is below a critical limit. The throughput never reaches its maximum value if the new packet generation rate is less than this critical limit irrespective of the number of transmissions. The maximum throughput is attained by adjusting the number of transmissions, pertaining to the n...

This paper presents a design and implementation result of a high-speed, low-complexity four data-path 64point radix-2 FFT/IFFT processor for high-throughput MIMO-OFDM wireless LAN system. The proposed FFT/IFFT processor can provide a higher throughput rate and low hardware complexity by using a four-parallel datapath scheme and a multipath delay feed-back (MDF) structure. The proposed four data...

In this paper, a new throughput-based transmit antenna selection (AS) scheme is evaluated. First, a closedform solution for the throughput rate of a multiple-input multiple-output (MIMO) system, with a truncated selective repeat automatic repeat request (TSR-ARQ) or selective repeat plus go-back-N automatic repeat request (SR+GBNARQ) protocol at the data link layer, is proposed. In addition, a ...