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Provided is an alternative physical interpretation of the wireless channel impulse response using the knowledge of the antenna impulse responses. As a result, it can be shown that the clusters in the popular Saleh-Valenzuela model actually represent one multipath component only, not several rays as is often assumed. This knowledge has a significant impact on receiver architecture since the number...
Providing diversity is one of the two possible objectives (the other one is providing multiplexing) of a multi-input multi-output (MIMO) system. For ultra wideband (UWB) impulse radio systems using rake receivers, there are already richly inherent multipath diversities. However, there may be UWB applications making use of more than one UWB transmit antenna and/or receive antenna, which leads to UWB...
UWB impulse radio communications can provide multi-path diversity when a rake receiver is used. The narrow time domain pulse can effectively combat the fading. Perfect pulse synchronisation is, however, required to obtain optimum performance. For a correlation receiver, small timing jitter between the reference pulse and the received pulse causes performance degradation. Analytical results for the...
A fully integrated MMIC (monolithic microwave integrated circuit) receiver designed and fabricated using the 0.2- mu m pseudomorphic InGaAs-GaAs high-electron-mobility-transistor (HEMT) process technology is discussed. This MMIC receiver incorporates a single-stage RF amplifier, a two-staged balanced local oscillator (LO) amplifier, a single-stage IF amplifier, an IF switch and an image-reject diode...
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