Dual Standard Mobile Handsets for News
نویسندگان
چکیده
Remote news reporting via fixed telephones suffers from a lack of mobility and sound quality limitations. Options for the design of a GSM/DECT dual-standard mobile terminal for broadcast news gathering are presented. Simulation results show that GSM HSCSD could carry MPEG encoded audio and occasional pictures. Computer simulations demonstrate that a mean of 3 GSM channels (aggregate of 28.8kb/s) should be available for each HSCSD mobile transmission. Two methods of returning enhanced quality audio (10kHz) are considered and the effects of transmission errors in urban environments simulated. Techniques to reduce the effect of errors are also evaluated. MOS results compare the schemes with a standard GSM traffic channel. Where service provision is available, DECT can return MPEG coded audio and supporting video clips. The additional coding required to return high quality news over dual-standard mobiles leads to increased delay; the effects of delay were simulated and found to have no significant impact on the viewers’ perception.
منابع مشابه
A Well-tested Infrastructure Conforming to the Uma Standard Lets Your Phone Decide
isting ones. Convergence of WiFi and cell technologies in a single handset will enable pervasive access to voice and data indoors and out with one standard,one network,and one device. Most cell-phone manufacturers, including Nokia and Motorola, are introducing dual-mode handsets sporting cellular and WiFi interfaces. An April 2004 report from onworld.com forecasts 400 million WiFi-enabled hands...
متن کاملLoad-balancing channel assignment for dual-band PCS networks
This paper investigates the channel assignment problem of dual-band PCS systems where single-band and dual-band handsets co-exist. Load-balancing channel assignment schemes are proposed to improve the system performance. To balance the loads of both bands, the BSC selects a band to serve a call request of a dual-band handset based on the loads of both bands. In addition, a channel re-assignment...
متن کاملThe how and why of small-device hypervisors
Today's technical news is filled with stories of server and desktop virtualization, but there's another virtualization technology that's growing rapidly: embedded virtualization. The embedded domain has several useful applications for virtualization, including mobile handsets, security kernels, and concurrent embedded operating systems. This article explores the area of embedded virtualization ...
متن کاملNovel Wideband MIMO Antennas That Can Cover the Whole LTE Spectrum in Handsets and Portable Computers
A dual resonant antenna configuration is developed for multistandard multifunction mobile handsets and portable computers. Only two wideband resonant antennas can cover most of the LTE spectrums in portable communication equipment. The bandwidth that can be covered by each antenna exceeds 70% without using any matching or tuning circuits, with efficiencies that reach 80%. Thus, a dual configura...
متن کاملPERFORMANCE OF SMART ANTENNAS WITH ADAPTIVE COMBINING AT HANDSETS FOR THE cdma2000 SYSTEM
In this paper, we present simulation results for the performance gain of smart dual antennas with adaptive combining at handsets for the forward link in the cdma2000 system. The adaptive algorithm based on the normalized least-mean-square (N-LMS) algorithm is applied, in which antenna weights are recursively obtained. The system was modeled with the SPW of Cadence. Our simulation results show t...
متن کامل