3G radio design for femtocells offers mobile operators the means to put pressure on UMA and VoWiFi
Cambridge Consultants has designed a cellular basestation radio based on a consumer-grade handset component, to support picoChip's reference design for the 3G femtocell market. The radio extends picoChip's reference design for a 3G home basestation, providing developers with an exceptionally low cost implementation for a global market that is expected to grow to 100 million units per annum within a few years. Femotcell products allow cellular operators to counter the competitive technologies of UMA (Universal Mobile Access) and VoWiFi (voice-over-WiFi), with the added advantage of allowing customers to use their existing standard cellular handsets.
The HSDPA/HSUPA-compatible WCDMA design breaks new ground by adapting an IC created for low-cost/high-volume handset applications to implement the high-specification basestation radio, combined with an architectural split that exploits the very high computational performance available in the picoArray DSP device to perform the baseband and system control functions.
The resulting 3G home basestation design requires just these two major ICs - a bill of materials that meets the aggressive cost targets needed for this mass application. Alternative implementations can require more expensive carrier-class radio components, combined with processing cores based on both
DSP and FPGA technologies. The 3G basestation design supports HSDPA and
HSUPA (high speed downlink packet access and uplink packet access) data rates of 7 Mbits/second and 2 Mbits/second respectively.
picoChip awarded the design contract to Cambridge Consultants because the product developer offered experience of designing radios for highly cost sensitive markets such as 2G, ZigBee, DECT and Bluetooth.
"There are numerous radio consultancies out there, but few with a track record in creating designs optimized for low-cost/high-volume consumer applications," says Rupert Baines, picoChip's VP of marketing. "Cambridge Consultants gave us this skill, backed by the knowledge that our engineering teams work well together - as demonstrated on a successful previous WiMAX project."
"If this application is to succeed, the bill of materials has to be in the same ballpark as a WiFi access point, a market with a supplier base that has a lead of several years in driving down costs," adds Cambridge Consultants'
Tim Fowler. "A novel architectural split gave us the key - allowing us to use an existing consumer IC for the radio. We believe that this design could trim a year or more off the time it would normally take OEMs to get the costs of 3G access points down to the point needed for mass roll out."
The design is based on a commercial handset radio IC, and the PC202 picoArray - picoChip's device targeted at high volume applications. This latter multi-core DSP incorporates an array of processors, combined with an ARM 926EJ-S processor, and other resources needed to implement a baseband processor including a cryptographic engine and turbo coding logic.
Share this article with others
Post to del.icio.us
Printed from http://www.mobileeurope.co.uk/news_wire/113152/3G_radio_design_for_femtocells_offers_mobile_operators_the_means_to_put_pressure_on_UMA_and_VoWiFi.html
Comment on this article
Skip to comments
We encourage users to analyse, comment on and even challenge Mobile Europe's articles, including the one above - '3G radio design for femtocells offers mobile operators the means to put pressure on UMA and VoWiFi'
User reviews and comments that include profanity or personal attacks or other inappropriate comments or material will be removed from the site.
Additionally, entries that are unsigned or contain "signatures" by someone other than the actual author will be removed. We will take steps to block users who violate any of our posting standards, terms of use or privacy policies or any other policies governing this site.