Coverage Spectral Efficiency of Cellular Systems with Cooperative Base Stations

Abstract

Coverage spectral efficiency (CSE) characterizes the tradeoff between efficient channel reuse and the achievable rates per cell, under the assumption of detection by a single base station and intra-cell FDMA. It is well known that intra-cell FDMA is not in general optimal. In this paper we study an alternative intracell wide-band scheme as well as the base station cooperation in detection, which has demonstrated potential capacity gain. The effect on CSE of different schemes are then compared and the optimal reuse distance is determined for each scheme.

Precoding and channel state information sharing in cooperative macro base stations and femto sites

“…Nevertheless, angle.h 1 / should be sent by the user to the macro BS. With the precoding vector at the macro BS as in (17), the received SNR at the user can be written as Comparing (7), (10), and (18), it can be shown that C ,1 > S,1 > I ,1 . As a consequence, the cooperation between the macro BS and FS can improve on the performance of the user with the aid of the angle information angle.h 1 / sent by the user to the macro BS in conjunction with single-user precoding at the macro BS.…”

“…The cooperative transmission design in this study focuses on the precoding design at the macro BS. Therefore, the cooperation schemes in conventional works [6][7][8][9][13][14][15][16][17] cannot be used in this study.…”

“…As mentioned previously, the cooperation between the macro BSs and FSs in this study is different from the conventional cooperation schemes among BSs [6][7][8][9][13][14][15][16][17], as the operations at all the BSs can be similar but the FSs are assumed to be under open-loop transmission in this study. The cooperative transmission design in this study focuses on the precoding design at the macro BS.…”

“…Precoding has been proven as a promising technique in cellular and relay systems [11,12]. In the past decade, the idea of cooperation among BSs has been widely studied in the literature under various terminologies, for example, multi-cell/network/multi-BS MIMO/beamforming/precoding [13,14] and cooperative/ coordinated/collaborative BS/multi-point/networks [15][16][17]. The BSs can share user data and the channel state information (CSI) with each other to support cooperative transmission.…”

Minimum Cell Size for Information Capacity Increase in Cellular Wireless Network

“…Therefore the exact value of K and P t does not enter into the analysis [82] . Therefore, we assume K = 1, P t = 1, and focus on the attenuation factor.…”