A Look at Broadcom's BCM21892 LTE Baseband at MWCby Brian Klug on February 27, 2013 3:42 AM EST
Yesterday we stopped by Broadcom to look at their newly announced BCM21892 LTE baseband, which we saw teased previously at CES doing a VoLTE call. If you're not famliar with the details of Broadcom's first LTE baseband, it's a 3GPP Release 10 modem supporting all the 3GPP air interfaces (GSM/EDGE, WCDMA, TD-SCDMA, LTE) with Category 4 LTE support, support for 10+10 MHz carrier aggregation, integrated 8 port transceiver into the baseband package, and built on a 28nm HPm process.
|Broadcom's LTE Baseband|
|Air Interfaces||GSM/EDGE, WCDMA, LTE-A, TD-SCDMA|
|3GPP Release||Rel. 10 (LTE-A)|
|HSPA+ Category||Cat. 24, DC-HSPA+ 42.2 Mbps|
Cat. 4, LTE-A 150 Mbps Downlink / 50 Mbps Uplink
|Voice||VoLTE, CS WCDMA/GSM voice|
|Package||Plastic(?) with integrated DRAM and 8-port Transceiver|
|Extra||External PMIC, "35% smaller required implementation area," envelope tracking supported|
There's nothing new about the feature set, but it was nice to see BCM21892 silicon working and demonstrating all of the available features we heard about in the announcement working. I recorded a video of the entire demo walkthrough which I'd encourage you to watch if you're interested. The booth contained both BCM21892 working on a few demo boards, as well as integrated with their own platform form factor reference design which runs the full house of Broadcom silicon - WLAN/BT Combo, SoC, and GPS.
Broadcom demonstrated both full 150 Mbps UE Category 4 rates on a cabled up demo, 10 + 10 MHz carrier aggregation on Band 17 and 4 (AT&T's configuration) switching in and out the band 4 carrier, and envelope tracking support working on the BCM21892.