Ubiquiti M445GH User Manual
4X4-5GH
Dual-Band 4
x4 with 4 SS
MIMO 802.11a/n/ac WLAN SoC
Device Specification
1 Introduction
1.1
The
network (WLAN) system-on-chip (SoC) for 5 GHz 802.11ac. The
dio with 160 MHz and 80+80 MHz support. It includes a CPU and memory for WLAN media access
layer (MAC) and physical layer (PHY) management and provides host offload of other highlevel networking tasks. It enables high-performance 4x4 MIMO with 4 spatial streams for wireless applications
demanding the highest robust link quality and maximum throughput and range, plus 4 spatial stream
MU-MIMO. The
converters (ADC/DAC), 4x4 MIMO radio transceivers, and PCIE interface in an allCMOS device for
low power consumption and small form-factor applications.
The
channel operation in 5 GHz mode, and IEEE 802.11a/n/ac data rates. Additional features include 802.11ac
explicit transmit beamforming (TxBF), 802.11 compatible implicit TxBF, multi-user MIMO (MUMIMO), Dynamic Bandwidth Switching, Per Packet Switching between 4SS/80 MHz and 2SS/160/80+80
MHz, Maximal Likelihood (ML) decoding, Low-Density Parity Check (LDPC), Maximal Ratio Combining (MRC), Space Time Block Code (STBC), and On-Chip OneTime Programmable (OTP) memory to
eliminate the need for an external flash and to further reduce the external component count and BOM cost.
The
and 802.11e quality of service (QoS).
The
high throughput and extended coverage. Tx chains combine PHY in-phase (I) and quadrature (Q) signals,
convert them to the desired frequency, and drive the RF signal through external power amplifiers (PAs). Rx
chains receive from antennas through external LNAs. The frequency synthesizer supports 1-MHz steps to
match frequencies defined by IEEE 802.11a/b/g/n/ac specifications. The
transfer to and from the host using a PCIE interface that supports interrupt generation and reporting and
status reporting. Other external interfaces include EEPROM and GPIOs.
General description
4X4-5GH
4X4-5GH
4X4-5GH
4X4-5GH
with Qualcomm® VIVE
4X4-5GH
implements half-duplex OFDM, supporting 1.733 Gbps for 802.11ac 160/80+80/80 MHz
supports 802.11 wireless MAC protocol, 802.11i security, Wi-Fi offload, error recovery,
supports up to four simultaneous spatial streams integrating four Tx and four Rx chains for
integrates a multi-protocol MAC, PHY, analog-to-digital/ digital-to-analog
TM
802.11ac technology is a highly integrated wireless local area
4X4-5GH
is a synthesizer WLAN ra-
4X4-5GH
supports frame data
4X4-5GH
Dual-Band 4x4 with 4 SS MIMO 802.11ac/abgn WLAN SoC Device Specifica
1.2 Features
General
4x4 SU-/MU-MIMO technology improves effective throughput and range over existing 802.11a/n/
ac
products
Support for up to four spatial streams
Support for 48-MHz crystal
156-pin, 12 mm x 12 mm DRQFN package
Package footprint compatible with QCA9994
WLAN
Dual-synthesizer WLAN radio with 80+80 MHz support
Supports 20/40/80/80+80 MHz at 5 GHz
Supports up to 256 QAM
Data rates of up to 1.733 Gbps in 802.11ac 80 MHz channels using reduced (short) guard interval (GI)
Multi-user MIMO (MU-MIMO) beamformer
802.11ac explicit transmit beamforming (TxBF) and legacy implicit TxBF for both beamformer and
beamformee
TCP and UDP checksum offload
Dynamic bandwidth switching
Per-packet switching between 4SS/80 MHz, 2SS/160 or 80+80 MHz
Maximal likelihood (ML) decoding
Supports spatial multiplexing, cyclic-delay diversity (CDD), low-density parity check (LDPC),
maximal ratio combining (MRC), Space Time Block Code (STBC)
AMSDU and AMPDU frame aggregation
802.11e-compatible bursting
Digital predistortion
Support for locationing (RSSI and RTT-based, 802.11REVmc compliant)
tion Introduction
Supported Standards
802.11a/n/ac
Support for IEEE 802.11d, e, h, i, j, k, r, u, v time stamp, w, and z standards
CPU/Memory
Integrated CPU for Wi-Fi offload with memory
On-chip OTP memory
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