Studies of a Method for Digital Voice Communication

Efficient codebook design for digital communication through compressed voice channels

The common voice channels existing in cellular communication networks provide reliable, ubiquitously available and top priority communication mediums. These properties make voice dedicated channels an ideal choice for high priority, real time communication. However, such channels include voice codecs that hamper the data flow by compressing the waveforms prior to transmission. This study design...

Digital Voice Communication in the Maritime VHF Band

Today’s and future communication systems in maritime rely on digital data communication between the ship and transceivers that are either on land, in air (satellite) or on sea. Analog voice communications is not an integrated part of future maritime communication system proposals. However, it is in general preserved in its functionality according to future maritime communication system proposal...

The Impact of Simulated Digital Data Radio Communication Induced Interference on Voice Radio Communication Intelligibility

RELP Coding for Voice Communication

In mobile communication systems, bandwidth is a precious commodity, and service providers are continuously faced with the challenge of accommodating more users within a limited allocated bandwidth. Linear Predictive Coding (LPC) offers low bit-rate speech coding that can be used to meet this challenge. The lower the bit rate at which the coder can deliver toll quality speech, the more speech ch...

investigating the feasibility of a proposed model for geometric design of deployable arch structures

deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...