Broadcom Supports RSDB Capabilities in Latest Mobile Devices

Broadcom, a global semiconductor company for wired and wireless communications, recently announced the BCM435, a 5G Wi-Fi 2x2 MIMO (Multiple Input Multiple Output) combo chip that supports RSDB (Real Simultaneous Dual Band) functionality for mobile devices.



The BCM4359 chip “really demonstrates Broadcom’s leadership in high-performance MIMO technology,” said David L. Recker, senior director of embedded wireless business unit in Broadcom’s Wireless Connectivity Combo (WCC) group.


The BCM4359's RSDB capability allows simultaneous connections to the 5GHz and 2.4GHz bands, providing increased data throughput and reduced latency when using multiple applications.

The ability to receive and transmit signals between the two bands provides an enhanced multitasking experience for connectivity-conscious users.

These benefits are especially evident when streaming video or gaming. "The RSDB feature allows users to share content with their surroundings while connected to a network," explains David Recker.

The BCM4359's frequency bandwidth is maximized at 867 Mbps PHY rate in two-stream MIMO mode, with the ability to quickly switch to RSDB mode for applications requiring multi-band connectivity.

Additionally, the Dynamic Frequency Selection (DFS) feature supported by the BCM4359 enables additional channels to be used, providing faster speeds while significantly reducing link failures. Broadcom’s Narrow Band technology extends the connection range between devices by up to two times.

When used in conjunction with the recently announced BCM4366 4x4 MU MIMO chip for routers, the BCM4359 provides an end-to-end solution that brings together all the benefits of next-generation MU MIMO technology.

Broadcom also announced the BCM43455, a highly integrated, low-cost 1x1 5G Wi-Fi combo chip for mainstream smartphones that delivers 5G Wi-Fi performance and features while reducing the BOM cost by up to 50 percent.



5G Wi-Fi MIMO infrastructure is already in place, with more than 90% of all Wi-Fi currently being MIMO-enabled, and Broadcom is also supporting this.

"As Wi-Fi and Bluetooth technologies advance and are installed in more devices, users' expectations for 'connectivity' are increasing. “5G Wi-Fi MIMO combo architecture will allow smartphones and tablets to operate across multiple frequency spectrums simultaneously, ensuring the highest quality connectivity and the best user experience,” said David Recker.

The BCM4359 is currently in the sampling phase and is scheduled for production in the second half of this year, David Recker said.