- Patent Title: Supporting distinct single-input single-output (SISO) services in a multiple-input multiple-output (MIMO) baseband circuit, particularly suited for a distributed antenna system (DAS)
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Application No.: US14983860Application Date: 2015-12-30
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Publication No.: US09608702B2Publication Date: 2017-03-28
- Inventor: Liav Moshe Daniel
- Applicant: Corning Optical Communications Wireless Ltd
- Applicant Address: IL Airport
- Assignee: Corning Optical Communications Wireless Ltd
- Current Assignee: Corning Optical Communications Wireless Ltd
- Current Assignee Address: IL Airport
- Agent C. Keith Montgomery
- Main IPC: H04B7/06
- IPC: H04B7/06 ; H04B7/0413 ; H04L29/06 ; H04B1/00

Abstract:
One embodiment of the disclosure relates to supporting distinct single-input single-output (SISO) services in a multiple-input multiple-output (MIMO) baseband circuit, particularly suited for a distributed antenna system (DAS). In this regard, in one aspect, two communication paths in the MIMO baseband circuit are reconfigured to distribute two distinct SISO signals. A quadrature modulator modulates the two distinct SISO signals to two different radio frequency (RF) bands, respectively, based on a modulation frequency. In another aspect, the two or more distinct SISO signals are provided to the quadrature modulator using two intermediate frequencies (IFs) that are determined based on the center frequencies and bandwidths of the two different RF bands. By reconfiguring the MIMO baseband circuit to distribute the two distinct SISO signals, it is possible to retro-support new wireless communication services and/or new RF bands in existing DAS installations without replacing the MIMO baseband circuit.
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