A Division-Based Broadcasting Method Considering Channel Bandwidths for NVoD Services

2013 ◽  
Vol 59 (1) ◽  
pp. 62-71 ◽  
Author(s):  
T. Yoshihisa ◽  
S. Nishio
Keyword(s):  
Channel Bandwidths

scholarly journals The Westerbork Flexible Filterbank Backend

1996 ◽  
Vol 160 ◽  
pp. 17-18 ◽  
Author(s):  
Marco Kouwenhoven ◽  
Lodie Voûte ◽  
Michiel van der Klis ◽  
Hans Weggemans ◽  
Will Deich ◽  
...  
Keyword(s):  
Time Constant ◽  
Radio Telescope ◽  
Dispersion Measure ◽  
Optimal Bandwidth ◽  
Channel Bandwidths

The Westerbork Synthesis Radio Telescope (WSRT) has recently been fitted with a new backend designed for pulsar detection. This backend is a filterbank with 32 channels, for both the X and Y polarised signals. A novel feature is that the channel bandwidths are digitally tunable between 6.25 kHz and 2.8 MHz (Vasisht et al. in preparation). The time constant of the integration which follows detection can be digitally set at values between circa 50 ms and 10μS. For each observing frequency and each pulsar (with a known dispersion measure) we can choose an optimal bandwidth and signal smoothing.

On the impact of channel bandwidths and deployment areas clutter loss on spectrum sharing of next wireless systems

2008 ◽  
Author(s):  
Zaid A. Shamsan ◽  
Alaaeldin B. Ahmed ◽  
Waiel E. Osman ◽  
Lway F. Abdulrazak ◽  
Tharek Abd. Rahman
Keyword(s):  
Spectrum Sharing ◽  
Wireless Systems ◽  
The Impact ◽  
Channel Bandwidths

Polyphase analysis filter bank down-converts unequal channel bandwidths with arbitrary center frequencies

2011 ◽  
Vol 71 (3) ◽  
pp. 481-494 ◽  
Author(s):  
Fred Harris ◽  
Elettra Venosa ◽  
Xiaofei Chen ◽  
Bhaskar D. Rao
Keyword(s):  
Filter Bank ◽  
Channel Bandwidths

scholarly journals A 0.58 mm2 CMOS reconfigurable sigma delta ADC for mobile WiMAX receiver

2019 ◽  
Vol 23 (1) ◽  
Author(s):  
Jihene Mallek ◽  
Houda Daoud ◽  
Rahma Aloulou ◽  
Hassene Mnif ◽  
Mourad Loulou
Keyword(s):  
Dynamic Range ◽  
Pole Placement ◽  
Mobile Wimax ◽  
Sigma Delta ◽  
Analog To Digital ◽  
Placement Method ◽  
Channel Bandwidth ◽  
Sigma Delta Adc ◽  
Multi Mode ◽  
Channel Bandwidths

Objective: In this work the design of a fourth-order Reconfigurable Sigma Delta analog-to-digital converter (ΣΔ ADC) for 5MHz, 7MHz or 10MHz channel bandwidths are presented. Materials and methods: Our design technique aims to keep the same ADC architecture in response to multi-band and multi-mode aspects of Mobile WiMAX standard. To this end, we set each sampling frequency corresponding to each channel bandwidth, in order that the same OSR value would be kept for the different channel bandwidths. This technique is intended to optimize the power and area of the ADC that efficiently covers varying channel bandwidths. Moreover, we use the pole placement method to calculate the optimized filter coefficients of Continuous-Time Sigma-Delta (CT ΣΔ) ADC. Results and discussion: Over 5MHz, 7MHz and 10MHz channel bandwidths, the ADC achieved 72.89dB, 67.26dB and 66.47dB peak SNR values, respectively and a dynamic range of 73.5dB, 69.47dB and 66.5dB respectively with only 28mW, 28.2mW and 28.6mW power consumption respectively. Conclusions: The design of the proposed reconfigurable ADC intended for use in the mobile WiMAX standard were achieved. Moreover, the results obtained are satisfactory and are in accordance with theoretical expectations.

scholarly journals SPECTRUM SHARING STUDIES OF IMT-ADVANCED AND FWA SERVICES UNDER DIFFERENT CLUTTER LOSS AND CHANNEL BANDWIDTHS EFFECTS

2008 ◽  
Vol 87 ◽  
pp. 331-344 ◽  
Author(s):  
Zaid Ahmed Shamsan ◽  
Abdulaziz M. Al-Hetar ◽  
Tharek bin Abd Rahman
Keyword(s):  
Spectrum Sharing ◽  
Channel Bandwidths
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