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In this paper, the proposed system depends on the assist GPS (AGPS) idea in order to calculate the user position inside a building by using a roof-antenna (at known position) that has LOS with satellites. The antenna receives navigation data and sends it to the user using a wireless network. The distance between the user and the roof antenna is assumed less than 300 m. In this case, the time delay...
In this paper, the proposed system depends on the assist GPS (AGPS) idea in order to calculate the user position inside a building by using a roof-antenna (at known position) that has LOS with satellites. The antenna receives navigation data and sends it to the user using a wireless network. The distance between the user and the roof antenna is assumed less than 300 m. In this case, the time delay...
Analytical expressions concerning the capacity and bit error rate (BER) of multiple-input multiple-output systems with space-time block coding (STBC) are derived. Two fading environments are examined, log-normal and Rician channels. A tight closed-form upper bound is presented for the BER of systems operating in log-normal fading environments in addition to an upper bound for the capacity of this...
The paper deals with the estimation of two main parameters of frequency-hopping spread spectrum (FH-SS) signals': hop rate and epoch time. Hop rate is the number of frequency changes per second and it is equivalent to the code clock rate. Epoch time is the timing offset between the first hop and the receiver's clock when the transmitter and the receiver are not synchronized. Multiple-hop autocorrelation...
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