Early 6G Sub THz Wide Bandwidth Measurement with Band Stitching Technology

Early 6G Sub THz Wide Bandwidth Measurement with Band Stitching Technology

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Use UXA Signal Analyzer and Down-Converter,

 

6G Challenges

 

The next generation of cellular technology will make huge improvements in bandwidth utilization and frequency coverage. The potential 6G signal single component carrier can be above 2 GHz and whole signal bandwidth can be over 8 GHz. 6G signal frequency band can go up to sub THz as D-band (110170 GHz) or even H-band (220-330 GHz). Typically, high-performance signal analyzer itself on market can only analyze the signal up to 4 GHz and frequency to 50 GHz. Then how can we achieve high dynamic range in measurement over such wide signal bandwidth (either single carrier or OFDM)? And how can we maximize the signal analyzer for more test cases coverage (either power measurement or demodulation analysis)?

 

 

Band Stitching Technology

 

The wide band signal can be split into N sub-band acquisitions. Then each sub band can be processed using a new technique called DSIS (Digital Separation of Image and Spurious). It’s based on the fact that the real signal and its image respond differently to the phase changes of the LO signal. This characteristic makes it possible to digitally distinguish and extract real signal and its image separately. DIS (Digital Image Separation) can be further generalized from signals with different phase responses to LO, and as a result, spurious signals can also be separated. We call this generalization Digital Separation of Image and Spurious (DSIS).

 

Keysight 6G Sub THz Signal Generation and Analysis

 

Keysight's 6G sub-terahertz (THz) solution features an arbitrary waveform generator (AWG) that generates a wideband intermediate frequency (IF), which is upconverted to D-band (110-170 GHz). The signal is then down-converted to an IF and digitized with a UXA high performance signal analyzer, then demodulated and analyzed using X-Series measurement application. Band stitching technology is used to analyze 6G wide bandwidth signal with only 2 GHz or 4 GHz analysis bandwidth option.