Bandwidth-efficient digital transmission up to 155 Mb/s over unshielded twisted pair wiring

Video on phone lines: technology and applications

“…The slate of transmission technologies may still be the ones previously considered for basic-access DSL, HDSL, and ADSL, or their variants. Indeed, such is what has taken place in the area of high-speed twisted-pair LAN's [76], [88]. For simplicity of equipment interface, the transmission rates …”

“…An examination of the frequency spectra shows that CAP and QAM are equivalent if the center frequency of the bandpass filters are at w, and w, is equal to an integer multiple of the symbol rate. A primary reason for favoring CAP over QAM in some implementations is the simplification the former offers [75], [76]. The simplification comes about because, in telephone wire…”

Dynamic algorithm transformations (DAT)-a systematic approach to low-power reconfigurable signal processing

“…Energy savings range from 0% to 74% as the input state changes from to . The average energy savings are computed via (40) and are shown in Table I. An average of 39% energy savings are achieved for this example.…”

“…The energy dissipation for the worst-case design corresponds to state , which requires the maximum number of powered-up taps, the maximum precision, and the maximum supply voltage . The energy savings, shown in Table I, are computed by employing (40). Energy savings range from 0% to 74% as the input state changes from to .…”

“…The total average energy dissipation per sample of a DAT-based system is obtained as (39) where, in general, will be negligible as compared to . The average energy savings due to a DAT-based system is given as (40) where is the energy dissipation of the worst-case design. In fact, equals the maximum value that in (38) can assume over all possible states .…”