What is the core strength of chip makers? Designing the kernel independently? Powerful GPU? Advanced process technology? These are important competitiveness and the key to determining whether a mobile phone can run smoothly. However, as a mobile phone, the first thing you need to be able to make a phone call is a mobile phone. The chip that determines communication is our familiar baseband. The baseband is also called a modem. It is mainly used to synthesize the baseband signal to be transmitted, or to decode the received baseband signal. It is also responsible for the compilation of address information (mobile phone number, website address), text information, and picture information.
In the early years, the mobile chip market was full of flowers, but Texas Instruments and NVIDIA were eventually eliminated by the market due to lack of baseband. On the contrary, Qualcomm took the lead in the mobile chip market with its baseband. It can be seen that in a certain sense, the baseband chip is the core competitiveness of the manufacturer, and even determines the survival of life and death. Then we will talk about the communication baseband in the mobile phone chip today.
Towards the 4G+ era
Although many of us now enjoy the convenience of 4G networks, I believe that everyone knows from the news that the development of 5G is in full swing, and various standards of argumentation have begun. It is expected to be commercially available in 2020. In the four years of this gap, 4G+ was pushed out. The concept of this fashionable concept is the LTE-A technology that many chip manufacturers have mentioned before.
The full name of LTE-A is LTE-Advanced, which, as its name suggests, is the evolution standard of the next phase of LTE networks. Prior to the development of the 4G standard, the International Telecommunications Union (ITU) defined 4G as a network rate of 1 Gbps downlink 500 Mbps upstream. However, due to technical limitations, there is no wireless communication technology around the world that can achieve such high network speeds. Therefore, in order to be able to take advantage of the competition, some foreign operators represented by Verizon have taken a different approach and promoted the LTE technology originally used as the 3.9G standard as 4G technology. Over time, people default to LTE as part of the 4G standard.
Although it does not achieve the expected 1Gbps downlink speed, with the peak rate of 150Mbps LTE as the basis, the faster rate will be guaranteed. With the advancement of communication technology, the spectrum utilization rate of LTE networks continues to increase, and another new technology has entered the public view, which is multi-carrier aggregation. The so-called multi-carrier aggregation is actually to aggregate the network signals of multiple frequency bands to achieve a substantial increase in the rate. This is like on the highway. The 150Mbps peak rate LTE we use now is like a four-lane. Although it is already wide, the number of cars passing through the unit time is still limited, and the carrier aggregation technology is like adding N next to it. For a lane, the number of cars passing through the unit will increase exponentially as the number of carriers increases.
At present, many operators around the world have launched dual-carrier or even three-carrier LTE technology. The theoretical peak rate has been greatly increased from 150Mbps to 300Mbps and 450Mbps. The three major operators in China are also commercialized in first-tier cities. LTE-A network. It can be said that since the first half of last year, the LTE-A network has entered an outbreak period, and the number has nearly doubled. This means that the corresponding mobile phone terminals have to be replaced with new ones to support this technology, which provides new products for weak chip manufacturers. Opportunity, which chip manufacturers will benefit from it?
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