Abstract
Harmonics of digital signals generated by components of a mobile device can get coupled to useful signals via the device antenna and appear as noise and desensitize the receiver. This disclosure describes techniques of dynamic spread spectrum clocking (SSC) and dynamic MIPI (mobile industry processor interface) frequency adjustment to arrest the degradation of receiver/antenna performance caused by harmonics generated by device components. Examples of device components include the camera, the MIPI serial interface of the display, the DDIC (display driver integrated circuit) oscillator, etc. Problematic frequency ranges, e.g., frequency ranges of communication channels rich in harmonics generated by components, are identified. SSC is selectively enabled or disabled to reduce or eliminate interference. The MIPI frequency is adjusted such that MIPI harmonics do not fall in presently used communication channels.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Chiang, Karl; Chen, Alan; Lee, Jehyoung; McDonnell, Nicholas M.; Hsu, Andy; Lai, Lendan; Lai, Jerry; and Lin, Chisa, "Reducing Wireless Harmonics using Dynamic Spread Spectrum Clocking and Dynamic Adaptation of MIPI Frequency", Technical Disclosure Commons, (February 08, 2024)
https://www.tdcommons.org/dpubs_series/6669