Nowadays, as a hotspot of next-generation communication technology, 5G technology faces many research problems. One of them is the need to analyze a large number of waveforms, frequencies and bandwidths. In addition to the traditional waveforms below 6 GHz, microwaves are also included. Waveforms such as millimeter waves, some waveforms even involve large bandwidths. All of these factors present new testing challenges for the generation and analysis of 5G signals, so flexibility is a key requirement for today's 5G research. Here, Xiaobian will combine Keysight's 5G waveform signal generation and analysis system software. Taking two separate cases of RF and millimeter wave as examples, we will explain how to combine hardware and software in the 5G waveform application scenario. Different waveforms were tested and analyzed.
What are the requirements for implementing software and hardware and technology for 5G testing?Early 5G research and testing put forward three requirements for flexibility: 1 to generate and analyze new waveforms; 2 to support a wide range of modulation bandwidths from a few MHz to several GHz; 3 to support a wide range of RF to microwave to millimeter waves Frequency Range. Keysight recommends that the test bench meet the flexibility requirements for 5G testing through hardware and software.
At present, the country presents six major technical characteristics for 5G research:
- 1000 times more mobile data traffic per region
– 10 to 100 times more connected devices
– Typical user data rate increases by 10 to 100 times
– 10 times lower energy consumption
– end-to-end delay < 1ms
–5G access is ubiquitous, covering low-density areas
5G puts higher demands on the test system to propose multiple waveforms, support new technologies, equipment and implementation methods.
The 5G new waveform requires devices to support a higher density of user groups, higher data throughput, and more efficient use of the allocated spectrum. Multiple antenna technologies such as MIMO are needed to support high data throughput, and advanced technologies such as massive MIMO and adaptive beamforming are also being studied.
In addition, the 5G test platform must support multiple bands of traditional and new wireless access technologies (RATs), including 5G millimeter-wave band extensions for high data throughput applications. Multiple access modes need to be supported, including non-orthogonal multiple access (NOMA) mode, as well as random, periodic, and mixed modes.
Finally, new waveforms, multi-band, wide bandwidth, and higher order modulation may present new challenges for power amplifier (PA) design and may require the application of new PA digital pre-distortion (DPD) techniques.
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