组装
发表于 2025-3-30 10:24:25
Space vs. Polarization Diversity Gain in 2 GHz PCS 1900ty of > 10 wavelengths spacing and horizontal/vertical polarization diversity at cell sites in the MCI test systems in Richardson, Texas and Washington, DC. Data was taken with both the mobile unit antenna vertical, and with the mobile antenna tilted 45 degrees to the vertical to simulate the typica
向外才掩饰
发表于 2025-3-30 15:01:18
Minimization of Outage Probability in Cellular Communication Systems by Antenna Beam Tiltinga patterns, carrier-to-interference ratios, and carrier-to-noise ratios are adressed..Our results show that determination of the optimum tilt angle is important especially for interference limited cells. For an antenna height in excess of 50m, missing the optimum tilt angle by 1° leads to an increas
运动性
发表于 2025-3-30 17:55:04
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flavonoids
发表于 2025-3-30 21:55:12
On the Use of Signal-to-Noise Ratio Estimation for Establishing Hidden Markov Modelsrated. A dynamic channel model is first found by monitoring the receiver input signal-to-noise ratio (SNR). Each channel state is then embedded with a binary error Fritchman model. From the Markov model, system performance parameters, such as the bit-error-rate (BER), can be determined directly.
换话题
发表于 2025-3-31 04:25:25
On the Performance of 4-Phase Sequences in Asynchronous CDMA Systems al have developed 4-phase sequences with maximum periodic cross-correlation values that are smaller than those for 2-phase sequences and that asymptotically approach lower bounds on maximum cross-correlation. While a probabilistic analysis indicates that the performance of both types of sequenc
Dissonance
发表于 2025-3-31 05:38:27
Adaptive MLSE equalization forms for wireless communicationsl. In this paper, the principles of maximum likelihood sequence estimation (MLSE) are used to develop an adaptive equalizer, which is an extension of the Ungerboeck receiver. MLSE receivers operating in non-stationary channels require channel estimation and often require channel tracking and predict
CHAR
发表于 2025-3-31 11:36:18
Simulation of RBDS AM Subcarrier Modulation Techniques to Determine BER and Audio Qualityf next generation radios. AM subcarrier technology still remains under-developed and its possible applications untapped. One such application of AM subcarriers is the Advanced Traffic/Traveler Information System. In the proposed system, the digital signal is inserted between the AM carrier and the a
conscience
发表于 2025-3-31 16:19:16
Book 1996 systems and services for personal communications is underway. In the United States, the FCC propelled the wireless era from infancy to mainstream with a $7.7 billion auction of 60 MHz of radio spectrum in the 180011900 MHz band. With the largest single sale of public property in the history of mank
Merited
发表于 2025-3-31 17:40:34
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侵略主义
发表于 2025-4-1 00:21:20
The Effect of Directional Antennas in CDMA Wireless Local Loop Systemsference at the CDMA base station and lower subscriber transmit power. The effect of these gains on performance gains in cell capacity and cell coverage are presented. Our analysis focuses on the reverse mobile to base link only.