1 / 4

Selectivity / Channel Rejection

Selectivity / Channel Rejection. Gives a measure of how good the receiver is at handling interference Desired signal / Interferer. Power. Alternate channel rejection/ Selectivity [dB]. Adjacent channel rejection [dB]. Co-channel rejection [dB]. Frequency.

florencewood
Télécharger la présentation

Selectivity / Channel Rejection

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Selectivity / Channel Rejection • Gives a measure of how good the receiver is at handling interference Desired signal / Interferer Power Alternate channel rejection/ Selectivity [dB] Adjacent channel rejection [dB] Co-channel rejection [dB] Frequency Channel separation Channel separation

  2. Blocking Desired signal / Interferer Power Frequency Frequency Offset • Gives a measure of how good the receiver is at handling interference from a source further away in frequency

  3. Receiver Example Desired signal / WLAN Power Frequency 5 MHz Chip A Chip B Sensitivity: -100 dbm -97 dBm Blocking: 27 dB +/- 5 MHz offset 55 dB +/- 5 MHz offset Case 1: The power from the WLAN is –80 dBm. Receiver A can receive a –100 dBm signal. Receiver B can receive a –97 dBm signal. No degradation in receiver sensitivity.

  4. Receiver Example 2 Desired signal / WLAN Power Frequency 5 MHz Chip A Chip B Sensitivity: -100 dbm -97 dBm Blocking: 27 dB +/- 5 MHz offset 55 dB +/- 5 MHz offset Case 2: The power from the WLAN is –40 dBm. Receiver A can receive a -40-27 = -67 dBm signal. Receiver B can receive a -40-55 = -95 dBm signal. Receiver B have 27 dB better receiver sensitivity.

More Related