# US 2019/0356362 A1 · Mimo transceiver array for multi-band millimeter-wave 5g communication

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0356362 A1
- Document ID: US20190356362A1
- Status: Published application
- Kind: A1
- Application number: 15/980,529
- Filed: 2018-05-15
- Published: 2019-11-21
- Earliest claimed: 2018-05-15
- Assignees: Speedlink Technology Inc.
- Applicants: Speedlink Technology Inc.
- Inventors: Taiyun CHI; Hua WANG; Thomas CHEN
- Web page: https://patentgrep.com/patent/US20190356362A1

## CPC

- H04B 7/0404: the mobile station comprising multiple antennas, e.g. to provide uplink diversity
- H04B 7/0413: MIMO systems
- H04B 1/0014: {using DSP [Digital Signal Processor] quadrature modulation and demodulation}
- H04B 1/0032: {with analogue quadrature frequency conversion to and from the baseband (quadrature modulators and demodulators per se H03D3/007, H03C3/40)}
- H04B 1/0064: {with separate antennas for the more than one band (H04B1/0053 takes precedence)}
- H04B: TRANSMISSION

## Abstract

According to one embodiment, a compact broadband radio frequency (RF) frontend circuit includes a number of single-channel transceivers, a number of analog to digital converters (ADCs), where each of the ADCs is coupled to one of the single-channel transceivers, a number of digital to analog converters (DACs), where each of the DACs is coupled to one of the single-channel transceivers, and a digital signal processing (DSP) unit coupled to the ADCs and the DACs. The DSP unit is configured to generate a first set of digital data streams simultaneously and each of the first set of digital data streams is converted by a respective one of the DACs into an analog data stream to be transmitted to a remote device by a respective one of the single-channel transceiver.

## Claims

### Claim 1

A radio frequency (RF) frontend circuit comprising:
a plurality of single-channel transceivers, each single-channel transceiver including a receive chain and a transmit chain, both the receive and transmit chains to receive a common local oscillator signal;
a plurality of analog to digital converters (ADCs), wherein each of the plurality of ADCs is coupled to one of the plurality of single-channel transceivers;
a plurality of digital to analog converters (DACs); wherein each of the plurality of DACs is coupled to one of the plurality of single-channel transceivers; and
a digital signal processing (DSP) unit coupled to the ADCs and the DACs, wherein the DSP unit is configured to generate a first plurality of digital data streams simultaneously and each of the first plurality of digital data streams is converted by a respective one of the DACs into an analog data stream to be transmitted to a remote device by a respective one of the single-channel transceiver.

### Claim 2 (depends on 1)

The RF frontend circuit of claim 1, wherein the plurality of single-channel transceivers includes a plurality of identical channels.

### Claim 3 (depends on 2)

The RF frontend circuit of claim 2, wherein the plurality of single-channel transceivers support a plurality of users using the plurality of identical channels.

### Claim 4 (depends on 1)

The RF frontend circuit of claim 1, wherein each of the plurality of single-channel transceivers transmits and receives an independent data stream.

### Claim 5 (depends on 1)

The RF frontend circuit of claim 1, wherein the plurality of single-channel transceivers includes a plurality of antennas each corresponding to a separate radiation angle.

### Claim 6 (depends on 5)

The RF frontend circuit of claim 5, wherein the antennas track a user moving within a corresponding radiation angle.

### Claim 7 (depends on 6)

The RF frontend circuit of claim 6, wherein the antennas track a plurality of users moving within the corresponding radiation angle.

### Claim 8 (depends on 1)

The RF frontend circuit of claim 1, wherein each of the plurality of single-channel transceivers includes a bias interface.

### Claim 9 (depends on 1)

The RF frontend circuit of claim 1, wherein each of the plurality of single-channel transceivers includes a digital interface.

### Claim 10 (depends on 1)

The RF frontend circuit of claim 1, wherein the DSP unit is further configured to receive a second plurality of digital data streams from the ADCs.

### Claim 11 (depends on 10)

The RF frontend circuit of claim 10, wherein each of the second plurality of digital data streams is received by a respective one of the single-channel transceiver via a specific radiation angle.

### Claim 12 (depends on 11)

The RF frontend circuit of claim 11, wherein the second plurality of digital data streams are received simultaneously.

### Claim 13 (depends on 11)

The RF frontend circuit of claim 11, wherein the second plurality of digital data streams are synchronized in time.

### Claim 14 (depends on 1)

The RF frontend of claim 1, wherein the first plurality of digital streams are synchronized in time.