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Adaptive modulation schemes have been proposed to optimize Shannon's channel capacity in recent orthogonal frequency division multiplexing (OFDM) based broadband wireless standard proposals. By adapting the modulation type (effectively changing the number of bits per symbol) at the transmitter end one can improve the bit error rate (BER) during transmission at designated SNR. Blind detection of the...
Sine sweeps used as excitation signals provide a way to measure linear impulse response and harmonic distortion simultaneously. This technique is applicable to measurements of room acoustics as well as audio equipment. In this paper, both linear sweep and exponential sweep measurement procedures and results are presented. A novel amplitude modulation scheme for exponential sweep measurement is also...
This paper considers the Multiple Input Multiple Output (MIMO) capacity enhancement considering the Universal Mobile Telecommunication System (UMTS) Long Term Evolution (LTE) technology, in the downlink, including the effects of system bandwidth and Signal-to-Noise Ratio (SNR) efficiency. Firstly, the system bandwidth efficiency is calculated for LTE framework. Then, the SNR efficiency using Adaptive...
In this paper we present methods enabling the analysis and detection of the Universal Mobile Telecommunications System (UMTS) signals. Presented procedures enable estimation of the basic parameters of the signal, identification of the standard and provide knowledge concerning essential information about the transmitted signal. Efficiency tests of proposed method of analysis are also introduced in...
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