ALERT

[FREE DEMO] Deploy Your Enterprise Cloud in Minutes

Digital AMPS (D-AMPS)

Definition - What does Digital AMPS (D-AMPS) mean?

Digital AMPS (D-AMPS) is second-generation (2G) cellular technology meant as a further development over the North-American first generation system called AMPS (Advanced Mobile Phone Service). D-AMPS was widely used in the USA and Canada ever since the first commercial cellular network was first deployed in 1993. D-AMPS technology has been retired and largely replaced by GSM/GPRS and CDMA2000 cellular technologies.

Techopedia explains Digital AMPS (D-AMPS)

Digital AMPS, IS-54 and IS-136 standards, uses time division multiple access channel access method and is usually referred to as a TDMA System or simply TDMA rather than the more appropriate D-AMPS. D-AMPS uses existing AMPS technology to safely and easily transition from analog to digital systems in the same area, allowing for a quick upgrade from AMPS, the original analog standard system for cellular communication in the US and Canada.

D-AMPS is the digital version of AMPS and provides TDMA (time division multiple access) to AMPS in order to get three channels for every single AMPS channel, therefore tripling the number of calls possible in a single channel, which obviously triples throughput.

Technical specifications:

  • 48.6 kbit/s channel bit rate
  • 1.62 bit/s/Hz
  • 40 ms frame duration which is divided into 6.67 ms slots
  • Each 6.67 ms slot contains 324bits and 260 user data
  • Differential QPSK
  • Vector Sum Excited Linear Prediction (VSELP)

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
Tweat cdn.techopedia.com
"Techopedia" on Twitter


'@Techopedia'
Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Resources
The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.