Direct conversion receiver is a well-known receiver architecture that enables small, low power and cheap radio. However, I/Q imbalance caused by non-orthogonality between in-phase component and quadrature-phase component from the imperfections of quadrature demodulator is a major problem in this architecture. In addition, Carrier Frequency Offset (CFO) occurs as well. ...Download Now
The authors propose a packet delayed lattice reduction aided MIMO detection for 802.11n system. Lattice reduction algorithms are iterative in nature that results in long latency. In high throughput systems like 802.11n, reduction of latency via parallelization causes high hardware complexity. Without parallelization, the receiver needs to buffer the incoming ...Download Now
Knowledge-based systems are suitable for realizing advanced functions that re-quire domain-specific expert knowledge, while knowledge representation languages and their supporting environments are essential for realizing such systems. Although Prolog is useful and effective in realizing such a supporting environment, the language interoperability with other implementation languages, such as Java, is ...Download Now
Dynamic Channel Switching System (DCSS) has been proposed as a solution to improve the capacity of Wireless Mesh Networks (WMNs) which is compliant with IEEE 802.11 standards. DCSS divides wireless interfaces into data receiving and data sending interfaces. The receiving interfaces stay on specified channels, while the sending interfaces can ...Download Now
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