Basestations Applications Center

A SemiApps.com Applications Center

Commonalities between CDMA2000 and WCDMA Technologies

This paper identifies common fundamental techniques underlying cdmaOneTM, CDMA2000® and WCDMA technologies, as well as their family of standards. Furthermore, this paper demonstrates that these...  >>  

Digital Up and Down Converters for the CDMA2000 and UMTS Base Stations

This application note describes a reference design of multi-channel digital up converters(DUCs) and digital down converters (DDCs) for CDMA2000 and UMTS base stations. The provided DSP algorithms...  >>  

Tiny Crystal Oscillators From NDK Carry Bigger Tasks

Mobile Communication Base Stations -  Crystal oscillators used in equipment in base stations need to be more compact wiuth a more stable operation.  >>  

Basic concepts of WCDMA radio access network

There has been a tremendous growth in wireless communication technology over the past decade. The significant increase in subscribers and traffic, new bandwidth consuming applications such as...  >>  

Wireless Base Station Solutions from National Semiconductor

National Semiconductors offers a wide range of high performance signal path solutions for wireless basestation (BTS) and wireless infrastructure applications in 2G, 2.5G, 3G and 4G mobile...  >>  

Architecture and Component Selection for SDR Applications

In wireless communications, particularly the military space, software-defined radio (SDR) is the goal. The basic concept of SDR is to position the digital-to-analog separation as close as possible...  >>  

Debugging the wireless boundary shift

Digital tools add special capability for the trends impacting wireless design  >>  

LT5528 WCDMA ACPR, AltCPR and Noise Measurements

ACPR (adjacent channel power ratio), AltCPR (alternate channel power ratio), and noise are important performance metrics for digital communication systems that use, for example, WCDMA (wideband...  >>  

Selecting semiconductor technology for wireless products

The number of wireless standards and their potential single-chip combinations raises many questions about the right process technology for implementing next-generation products.  >>  

WCDMA Network Deployments: Asynchronous vs. Synchronous

A basic design decision facing an operator of a WCDMA network is the nature and level of synchronization between base stations in the network. The WCDMA standard allows asynchronous operation in...  >>  

Implementing a MAP Decoder for cdma2000(TM) Turbo Codes on TMS320C62x(TM) DSP

This document describes how to implement a maximum a posteriori (MAP) decoding algorithm for wireless turbo codes on a TMS320C62x(tm) digital signal processing (DSP) device. The max-log-MAP...  >>  

Maxim: BASESTATIONS / WIRELESS INFRASTRUCTURE

BASESTATIONS / WIRELESS INFRASTRUCTURE * Ethernet/Backhaul * High-Speed ADCs * High-Speed DACs * High-Speed Signal Distribution * Wireless and RF System Design  >>