Signalchip launches semiconductor chips for 4G/LTE and 5G NR modems

Signalchip has unveiled semiconductor chips for 4G/LTE and 5G NR modems in the presence of Telecom Secretary Aruna Sundararajan. The SCBM3412 and SCRF3402/4502 series of chips, code-named “Agumbe”, are the result of over eight years of relentless and deep R&D by Signalchip engineers. These chips put India into an elite group of countries that own this widely used fundamental technology.

At the event, Signalchip has unveiled four chips:

1. SCBM3412: a single chip 4G/LTE modem including the baseband and transceiver sections in a single device

2. SCBM3404: a single chip 4X4 LTE baseband modem

3. SCRF3402: a 2X2 transceiver for LTE

4. SCRF4502: a 2X2 transceiver for 5G NR standards

The RF sections cover all LTE/5G-NR bands up to 6GHz. These chips also support positioning using India’s own satellite navigation system, NAVIC. The Agumbe series builds up on SCRF1401: India’s first RF transceiver chip for high-performance wireless standards like 3G/4G and Wi-Fi, created by Signalchip in 2015.

The combined multi-standard system-on-chip (SoC) can serve as a base station chipset for a wide range of form factors from low-cost indoor small cells to high-performance base stations. These are optimally designed to support evolving network architectures like Open RAN/CRAN with flexible interface configurations. Through the IPs created for this device, the company now has the potential to design products for multiple related fields and is currently forging ahead with additional chipsets for advanced 5G NR features. With India having more than 1.1 billion mobile phones in use, one of the highest in the world, Signalchip has created high-performance and cost-efficient systems to enable densification of the network.

1. SCBM3412 – Single chip 2X2 LTE + WCDMA base-station chip: This device implements all functions of a 2x2 dual carrier MIMO LTE base station in a single chip. It also performs advanced front-end signal processing algorithms like crest factor reduction and predistortion. The RF portions cover all LTE bands up to 6GHz. This device targets to enable ultra-compact indoor small cells with minimal external components. This can be paired with an external PA module for covering medium range networks and also small form factor vehicle mounted or even backpack mounted base-stations used in disaster management and strategic applications.

2. SCBM3404: 4X4 LTE + WCDMA base station baseband chip: This device implements all digital baseband functions of a 4x4 MIMO LTE base station in a single chip. The device can transmit and receive 4 streams of data and can perform complex 4x4 MIMO reception. This device is targeted for larger form factor base stations to be paired with two SCRF3402 RF transceiver chips either through JESD204B ports on the same board, or through a CPRI link when used in a Baseband Unit that connects to a Remote Radio Unit (RRU).

3. SCRF3402: 2X2 LTE/WCDMA Analog-RF transceiver chip: This device implements all analog baseband and RF front-end functions of a 2x2 MIMO wireless system in a single chip. It contains the RF portions like low-noise amplifiers, power amplifier interfacing with the antenna, filters, high-speed data converters, frequency synthesizers, and mixers. The device also integrates a third auxiliary receiver to facilitate network listen, LTE-LAA listen before talk and the reception of navigation signals. This can be paired with SCBM3404 device and external PA modules for covering large area networks. In a unique feature, it supports direct operation with CPRI interface and hence can reduce significant cost in remote radio units.

4. SCRF4502: 2X2 5G NR/LTE/WCDMA Analog-RF transceiver chip: This device builds on SCRF3402 to add 5G NR features and extends the capabilities of the complete transceiver chain including low noise amplifiers, power amplifier interfacing with the antenna, filters, high-speed data converters, frequency synthesizers, and mixers to meet the requirements of 5G NR Frequency Range 1. Owing to the high degree of integration, this device can enable a compact form factor RRU for 5G massive MIMO and RAN systems.

Telecom Secretary Aruna Sundararajan says, "This is a proud moment for India's Digital Communications industry. I congratulate the Signalchip team for designing India's first indigenous semiconductor chips for 4G/LTE and 5G NR modems. India aspires to take a leadership role in developing inclusive 5G technologies for economic self-sufficiency and strategic needs of the country. These chips are a significant step in this direction as they have the potential to cater to the growing digital connectivity needs of the next 5 billion users, by enabling high performance mobile networks at lower cost. The Signalchip team's persistence over the 8-year R&D period and the commitment shown by Sridhar Vembu to believe in this vision is indeed commendable."

Himamshu Khasnis, Founder & CEO, Signalchip, says, “Currently in India, all devices and infrastructure, whether imported or domestically manufactured, use imported silicon chips. Silicon chip design is a very challenging activity requiring high-cost R&D, deep knowhow and mastery of multiple complex domains. Hence, this technology is not available in most countries. Given that wireless communication is central to almost all economic, strategic and domestic activities happening today, the ability to indigenously design and develop silicon chips is vital for the security and prosperity of our country.”

This team was mentored and funded by Sridhar Vembu, Founder & CEO of Zoho – a pioneer in cloud technology.

Sridhar Vembu, Founder & CEO, Zoho, says, “India has always had the talent required to build any technology. We just need to be patient and have enough capital to put it all together. It's a long-term commitment. Through smart planning and relentless efforts, Signalchip has acquired the capability required to create any complex and globally competitive silicon chip, indigenously from India. I truly appreciate the patience and diligence the Signalchip team has shown to build this chip. Only long-term R&D can make Indian companies globally competitive."