Wireless system using different bands in the transmit and receive direction and applying frequency shifts for bandwidth expansion
US10263684B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2017 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Jun 16, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless access point is configured to communicate in millimeter wave frequency bands in the downlink direction and in sub-6 GHz frequency bands in the uplink direction. The wireless access point includes a signal processing circuit configured to generate different spatial streams signals and a frequency shift circuit configured to apply different frequency shifts to the different spatial streams signals. The wireless access point includes a mixer driven by a local oscillator, which up-converts the frequency shifted signals to millimeter wave frequency band signals, wherein the millimeter wave frequency band signals are transmitted by a MIMO transmit antenna array. A wireless communication device applies different frequency shifts to the different spatial streams signals after down-converting the signals received at a higher millimeter wave frequency to a lower frequency below 6 GHz. The wireless communication device applies no frequency-shifts to different spatial streams signals transmitted at lower frequency below 6 GHz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.