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Advanced Bluetooth/WLAN Coexistence

BCM4354 Data Sheet

BROADCOM CONFIDENTIAL

Broadcom®

October 15, 2014 • 4354-DS109-R

Page 42

Advanced Bluetooth/WLAN Coexistence

The BCM4354 includes advanced coexistence technologies that are only possible with a Bluetooth/WLAN

integrated die solution. These coexistence technologies are targeted at small form-factor platforms, such as cell

phones and media players, including applications such as VoWLAN + SCO and Video-over-WLAN + High

Fidelity BT Stereo.

Support is provided for platforms that share a single antenna between Bluetooth and WLAN. Dual-antenna

applications are also supported. The BCM4354 radio architecture allows for lossless simultaneous Bluetooth

and WLAN reception for shared antenna applications. This is possible only via an integrated solution (shared

LNA and joint AGC algorithm). It has superior performance versus implementations that need to arbitrate

between Bluetooth and WLAN reception.

The BCM4354 integrated solution enables MAC-layer signaling (firmware) and a greater degree of sharing via

an enhanced coexistence interface. Information is exchanged between the Bluetooth and WLAN cores without

host processor involvement.

The BCM4354 also supports Transmit Power Control on the STA together with standard Bluetooth TPC to limit

mutual interference and receiver desensitization. Preemption mechanisms are utilized to prevent AP

transmissions from colliding with Bluetooth frames. Improved channel classification techniques have been

implemented in Bluetooth for faster and more accurate detection and elimination of interferers (including non-

WLAN 2.4 GHz interference).

The Bluetooth AFH classification is also enhanced by the WLAN core’s channel information.

Fast Connection (Interlaced Page and Inquiry Scans)

The BCM4354 supports page scan and inquiry scan modes that significantly reduce the average inquiry

response and connection times. These scanning modes are compatible with the Bluetooth version 2.1 page and

inquiry procedures.

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