Ungefär 127 resultat
|Another parameter evenmore importantthan peakspectralefficiency, and perhaps |
more realistic, is the mean spectral efficiency, defined as the sum of users data
rates normalized by the bandwidthandthe numberofcells. Inthe current definition
|That is, spectral efficiency defined in terms of channels/MHz/km2 can be |
expressed as 77! = (Total number of channels)/ [(system bandwidth)(total
coverage area)] And, spectral efficiency defined in terms of Erlangs/MHz/km2 can
be expressed ...
|Spectral efficiency, defined as the ratio of capacity per unit bandwidth, measures |
the ability of a wireless system to deliver information with a given amount of radio
spectrum and provides another key metric of the wireless system's quality.
|... the spectral efficiency defined as the data rate in bits per second per Hz unit of |
bandwidth: spectral efficiency=channel throughput/channel bandwidth
Depending on the efficiency of the communication systems and the signal-to-
noise ratio, ...
|Therefore, spectral efficiency, defined by electrical energy output in relation to the |
irradiated energy, decreases as wavelengths become smaller. The spectral
efficiency is best when the amount of energy from the incoming photon is just ...
Kamilo Feher - 1996 - 412 sidor
|In Table 1.2, the theoretical and practical spectral efficiency of PAM and also of |
partial-response systems (PRS) is listed [Feher, 1.5]. Note that in the case of PAM
systems, the practical spectral efficiency, defined at the 35- to 50-dB out-of-band
|Efficiency. Recall that spectral efficiency, defined in (6.7), is a measure of the bit |
rate achieved per Hz of bandwidth. To determine the maximum achievable
spectral efficiency for QAM, we use (6.8), repeated here for convenience, log2M »
|... a large increase in the capacity per Hz, also known as the spectral efficiency |
defined as the data rate in bits per second per Hz unit of bandwidth: spectral
efficiency = channel throughput/channel bandwidth Depending on the efficiency
of the ...
|For a single-user channel, the performance metric of interest is the spectral |
efficiency, defined as the data rate achieved per unit of bandwidth and measured
in units of bits per second per Hertz. When it is understood that the bandwidth is
|Naturally, with limited spectrum resources, MIMO techniques have become |
essential for achieving the minimum requirements (target cell spectral efficiency,
peak spectral efficiency, and cell edge user spectral efficiency) defined by the ITU