Space and frequency multiplexing for MM-wave multi-gigabit point-to-point transmission links

Abstract

During last 10 years, the use of frequencies at E-band from 71 GHz to 76 GHz, from 81 GHz to 86 GHz and from 92 GHz to 95 GHz to licensed users has been regulated in US, Europe, Australia and Japan. Due to the large amount of available bandwidth and reasonable atmospheric attenuation, these frequency bands are suitable for very high data rate radio communication for medium to long range wireless links. However, in order to convert the bandwidth availability into real capacity, suitable transmission techniques should be designed. In the present paper, we propose a space-frequency multiplexing technique using FDM, coded modulation and 4×4 MIMO spatial multiplexing for point-to-point multi-gigabit connection in the 81-86 GHz bandwidth. We tested the proposed system, considering different link distances, different values of pathloss and atmospheric and rain attenuations. Simulation results evidenced the possibility of achieving a 48 Gb/s net capacity over 5GHz bandwidth (spectral efficiency 9.6 b/s/Hz) with 99.98% availability at link distances up to 1 Km

A review of key development areas in low-cost packaging and integration of future E-band mm-wave transceivers

“…Augmentation of backhaul capacity is often hampered by the roll-out cost of DSL or 10 Gbps fiber optic lines, not only not only due to the cost of the fiber itself (up to 10,000 €/km) but also the roadwork and trenching required to install the fiber (up to 300,000 €/km) [5].…”

“…However, due to the availability of broadcast spectrum above 30 GHz (compared to traditional GSM, LTE and 2.4 GHz ISM bands, Fig. 1) attention is being turned to the underutilised mm-wave spectrum for future wireless communications applications, with mm-wave point-to-point links employed as a solution to lastmile fiber replacement or augmentation [5]. In this role, the E-0 10 20 30 40 50 60 70 80 90 0 1000 2000 3000 4000 5000 6000 7000 Spectrum (GHz) Channel bandwidth allocation (MHz) Figure 1: ICASA licensed spectrum and per channel bandwidth allocation [7].…”

MM-wave LTE-A small-cell wireless backhauling based on TH-IR techniques

“…In [6], single-carrier higher-order modulations and FDM channel aggregation techniques are used in combination with MIMO spatial multiplexing for P-t-P multi-gigabit short-distance E-band LOS connections, pushing the available data-rate up to 48 Gb/s. Works [5] and [6] suggest the use of E-band for P-t-P backhauling.…”

“…Works [5] and [6] suggest the use of E-band for P-t-P backhauling. Indeed, in [7], authors consider E-band for P-t-P backhauling in LTE-A small cells in combination with point-to-multipoint NLOS backhauling at 6 GHz.…”

Design of a Practical and Compact mm-Wave MIMO System with Optimized Capacity and Phased Arrays

“…The main advantage of using MIMO at mm-wave bands is that by having a proper inter-element spacing in both transmitting and receiving antennas, multiple independent streams, and thus high capacity, can be obtained, even in LOS [5]. Different LOS MIMO systems have been proposed and tested indoor [6] and outdoor [7,8]. Another unique characteristic of mmwave band communications is that highly directional beams can be obtained using relatively small antennas.…”