—Massive MIMO has been acknowledged as a promising technology to counter the demand for higher data capacity for wireless networks in 2020 and beyond. However, each Base Station (BS) requires good enough knowledge of Channel State Information (CSI) on both the uplink and the downlink as massive MIMO relies on spatial multiplexing. In Time Division Duplex (TDD) massive MIMO systems, this CSI is...

Massive Multiple Input Multiple Output is most promising technology that has been proposed in recent years, and it has been considered a technology to fulfill the requirement of fifth generation network. Even though this technology has many advantages, it must surpass certain challenges as well, and one of the major challenge is signal detection at the base station which becomes more complex wi...

Massive multiple-input multiple-output (MIMO) is one of the strong candidates for future generation mobile systems. Theoretical studies promise orders-of-magnitude improvements in both spectral and energy efficiency, as the number of antenna elements on base-stations grow large. While these studies are performed under simplifying assumptions, such as independent and identically distributed elem...

Massive multiple-input multiple-output (MIMO) systems can be applied to support numerous internet of things (IoT) devices using its excessive amount of transmitter (TX) antennas. However, one of the big obstacles for the realization of the massive MIMO system is the overhead of reference signal (RS), because the number of RS is proportional to the number of TX antennas and/or related user equip...

سابقه و هدف: شهرنشینی در جهان رو به افزایش است جمعیت شهری حال متراکم تر شدن شهرها می باشد. یکی از اثرات درصد سطوح نفوذ ناپذیر این مناطق امروزه بسیاری شهرهای مهم جهان، برای کاهش توسعه شهر خود بر کیفیت کمیت رواناب، مفهوم پایدار توجه نموده فنّاوری‌های مدرن سبز مدیریتی، شامل بهترین روش‌های مدیریتی با حداقل جانبی بهره می‌گیرند. بام سبز، یک سیستم چندلایه ای که سقف بالکن ساختمان را پوشش گیاهی پوشانده ج...

This paper considers a decode-and-forward (DF) multi-way massive multiple-input multiple-output (MIMO) relay system where many users exchange their data with the aid of a relay station equipped with a massive antenna array. We propose a new transmission protocol which leverages successive cancelation decoding and zero-forcing (ZF) at the users. By using properties of massive MIMO, a tight analy...

Massive MIMO (Multiple-Input Multiple-Output) base stations have proven, both in theory and in practice, to possess many of the qualities that future wireless communication systems will require. They can provide equally high data rates throughout their coverage area and can concurrently servemultiple low-end handsets without requiring wider spectrum, denser base station deployment or significan...

This paper presents the design and implementation of a novel SDR based massive MIMO testbed with up to 70 nodes built at Tennessee Technological University. The deployment can reach a 30×30 antenna MIMO scheme. With this testbed, we are able to measure the channel matrix and compute the achievable rate of the massive MIMO system using experimental data. The measured channel capacity is linearly...