Exact(2)
Certain frequencies suffer from higher attenuation than others, due to the mechanical resonance of gas molecules [8, 9].
Detection distances between 22 und 35 m (mean 27.4 m ±4.3 m SD) appear rather high since the male song uses high frequencies around 25 kHz, and such high frequencies suffer from strong excess attenuation in scattering vegetation [33].
Similar(58)
Detailed simulation results show that FIR fractional delay comb filter-based sigma delta modulators tune accurately to most centre frequencies, but suffer from degraded resolution at frequencies close to Nyquist.
Unfortunately, compared with lower frequency bands, higher frequency bands suffer from severer propagation loss which seriously limits the coverage.
Many home network products that work wirelessly over radio frequencies can suffer from the same problem.
The advantage of this model is that (1) the estimation of frequencies does not suffer from co-linearity between Xis and (2) it is robust to coverage bias between regions (see Methods for detailed arguments).
Unfortunately, physical hardware implementations of radio frequency transceivers usually suffer from signal-dependent impairments, including the impairments from nonlinear power amplifier, phase noise and IQ-imbalance [25].
MC CC-CDMA systems transmitting over frequency-selective channels suffer from multiple access interference (MAI) owing to non-ideal correlation properties of complementary codes (CC).
However, the required frequency synthesizer can suffer from high complexity, as it needs to fulfill the constraints necessary to avoid interference between the users.
Individuals subjected to environments characterized by chronic low-frequency noise can suffer from insomnia, headache, tinnitus, discomfort, chest tightness, abdominal pressure, and other psychological and physical symptoms [3, 4].
Intermediate-frequency amplifiers do not suffer from these defects since the tuning frequency is fixed.
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