Extended Cooperative Balanced Space-Time Block Coding for Increased Efficiency in Wireless Sensor Networks

Abstract

Abstract. Diversity techniques for communications among sensors are very effective tool to increase reception quality and battery lifetimes. A well-known method to increase diversity in cooperative communications is sensor (relay) selection. However, sensor selection method may lead to the selection of the same (near) sensor for transmission over a long period. One of the alternative techniques to sensor selection is cooperative balanced space-time block coding which utilizes every sensor in sight, thus, distributes the energy consumption among many sensors. Furthermore, it guarantees full diversity for any number of relay sensors. In this work, we consider dual-hop amplify-and-forward wireless sensor network and extend the cooperative balanced space-time block code family to improve its performance. In the proposed scheme, a larger number of codes can be generated for improved coding gain, and better signal-to-noise ratio improvement can be obtained compared to sensor selection schemes.

Full rate full diversity cooperative Extended Balanced Space-Time Block Coding for wireless multicasting

“…Two bits of feedback is needed to select the MCEBSTBC matrices and k bits of feedback is needed to select the feedback a where k =d+1. In [6][7], the optimum code is selected according to the single user channel coefficients. However, the optimum MCEBSTBC for all multicast users is selected according to (5) In another words, when the first term of, is maximum, C 2 is selected.…”

“…The main drawback of the BSTBC is limited coding gain. In [6][7], the Extended Balanced Space-Time Block Coding (EBSTBC) scheme has been proposed. In the EBSTBC, an arbitrary number of codes can be generated for improved coding gain.…”

Performance Analysis of Binary Sensor-Based Cooperative Diversity Using Limited Feedback

“…The criterion in selecting a single active sensor is the best instantaneous sensor-fusion center channel gain (Luo et al, 2005), and this is called as sensor selection (SS n:1) (Eksim & Celebi, 2009a;Eksim & Celebi, 2010a). To maximize signal-to-noise ratio (SNR) at the fusion center, two active sensors are chosen out of all active sensors and then the selected sensors transmit the received signals using the Alamouti scheme (Gore & Paulraj, 2002).…”

“…In the simulations, the best active sensor pair which has the best instantaneous sensor-fusion center channel pair is selected. This is called as the sensor selection with Alamouti (SS n:2) (Eksim & Celebi, 2009a;Eksim & Celebi, 2010a). The bit error probabilities of the ECBSTBC, SS, SS with Alamouti and statistical STBC cooperative diversity (Ohtsuki, 2006) are evaluated by computer simulations.…”

Transmit antenna selection for extended balanced space-time block codes

“…The main drawback of the BSTBC is limited coding gain. In [8][9], extended balanced space-time block coding (EBSTBC) which increases the coding gain of the BSTBC has been proposed.…”