1 调制映射

Input: binary digits (0, 1)

Output: 复数调制符号

Modulation scheme	Modulation order	Downlink	Uplink (Transform precoding disabled)	Uplink (Transform precoding enabled)
π/2-BPSK	1	0	0	1
BPSK	1	0	0	0
QPSK	2	1	1	1
16QAM	4	1	1	1
64QAM	6	1	1	1
256QAM	8	1	1	1

π/2-BPSK

$d(i) = \frac{{{e^{j\frac{\pi }{2}\left( {i\bmod 2} \right)}}}}{{\sqrt 2 }}\left[ {\left( {1 - 2b(i)} \right) + j\left( {1 - 2b(i)} \right)} \right]$

BPSK

$d(i) = \frac{1}{{\sqrt 2 }}\left[ {\left( {1 - 2b(i)} \right) + j\left( {1 - 2b(i)} \right)} \right]$

QPSK

$d(i) = \frac{1}{{\sqrt 2 }}\left[ {\left( {1 - 2b(2i)} \right) + j\left( {1 - 2b(2i + 1)} \right)} \right]$

16QAM

$d(i) = \frac{1}{{\sqrt {10} }}\left\{ {\left( {1 - 2b(4i)} \right)\left[ {2 - \left( {1 - 2b(4i + 2)} \right)} \right] + j\left( {1 - 2b(4i + 1)} \right)\left[ {2 - \left( {1 - 2b(4i + 3)} \right)} \right]} \right\}$

64QAM

$d(i) = \frac{1}{{\sqrt {42} }}\left\{ {\left( {1 - 2b(6i)} \right)\left[ {4 - \left( {1 - 2b(6i + 2)} \right)\left[ {2 - \left( {1 - 2b(6i + 4)} \right)} \right]} \right] + j\left( {1 - 2b(6i + 1)} \right)\left[ {4 - \left( {1 - 2b(6i + 3)} \right)\left[ {2 - \left( {1 - 2b(6i + 5)} \right)} \right]} \right]} \right\}$

256QAM

$\begin{gathered} d(i) = \frac{1}{{\sqrt {170} }}\left\{ {\left( {1 - 2b(8i)} \right)\left[ {8 - \left( {1 - 2b(8i + 2)} \right)\left[ {4 - \left( {1 - 2b(8i + 4)} \right)\left[ {2 - \left( {1 - 2b(8i + 6)} \right)} \right]} \right]} \right]} \right. \\ \left. { + j\left( {1 - 2b(8i + 1)} \right)\left[ {8 - \left( {1 - 2b(8i + 3)} \right)\left[ {4 - \left( {1 - 2b(8i + 5)} \right)\left[ {2 - \left( {1 - 2b(8i + 7)} \right)} \right]} \right]} \right]} \right\} \\ \end{gathered}$

2 下行MCS和TBS

2.1 调制阶数和目标码率确定

应用场景：

PDSCH scheduled by a PDCCH with DCI format 1_0 or format 1_1 with CRC scrambled by C-RNTI, MCS-C-RNTI, TC-RNTI, CS-RNTI, SI-RNTI, RA-RNTI, or P-RNTI.
PDSCH scheduled without corresponding PDCCH transmissions using the higher-layer-provided PDSCH configuration SPS-config.

MCS表格选择

PDSCH-config -> mcs-Table	SPS-config -> mcs-Table	DCI	RNTI	Table
qam256		1_1	C-RNTI	Table 5.1.3.1-2
qam64LowSE		USS	C-RNTI No MCS-C-RNTI	Table 5.1.3.1-3
			MCS-C-RNTI	Table 5.1.3.1-3
	qam256	1_1	CS-RNTI	Table 5.1.3.1-2
	qam64LowSE		CS-RNTI	Table 5.1.3.1-3

Note：

The PDSCH is scheduled without corresponding PDCCH transmission using SPS-config.
其他情况查Table 5.1.3.1-1。

UE不会解码 Qm > 2 的P-RNTI, RA-RNTI, SI-RNTI加扰的PDSCH。

Table 5.1.3.1-2: MCS index table 2 for PDSCH

MCS Index I_MCS	Modulation Order Qm	Target code Rate R x [1024]	Spectral efficiency
0	2	120	0.2344
1	2	193	0.3770
2	2	308	0.6016
3	2	449	0.8770
4	2	602	1.1758
5	4	378	1.4766
6	4	434	1.6953
7	4	490	1.9141
8	4	553	2.1602
9	4	616	2.4063
10	4	658	2.5703
11	6	466	2.7305
12	6	517	3.0293
13	6	567	3.3223
14	6	616	3.6094
15	6	666	3.9023
16	6	719	4.2129
17	6	772	4.5234
18	6	822	4.8164
19	6	873	5.1152
20	8	682.5	5.3320
21	8	711	5.5547
22	8	754	5.8906
23	8	797	6.2266
24	8	841	6.5703
25	8	885	6.9141
26	8	916.5	7.1602
27	8	948	7.4063
28	2	reserved
29	4	reserved
30	6	reserved
31	8	reserved

如何理解该表格、Code Rate？

2.2 TBS确定

In case the higher layer parameter maxNrofCodeWordsScheduledByDCI indicates that two codeword transmission is enabled, then one of the two transport blocks is disabled by DCI format 1_1 if IMCS = 26 and if rvid = 1 for the corresponding transport block. If both transport blocks are enabled, transport block 1 and 2 are mapped to codeword 0 and 1 respectively. If only one transport block is enabled, then the enabled transport block is always mapped to the first codeword.

For the PDSCH assigned by a PDCCH with DCI format 1_0 or format 1_1 with CRC scrambled by C-RNTI, MCS-C-RNTI, TC-RNTI, CS-RNTI, or SI-RNTI, if Table 5.1.3.1-2 is used and 0<= I_MCS <= 27, or a table other than Table 5.1.3.1-2 is used and 0<= I_MCS <= 28 , the UE shall, except if the transport block is disabled in DCI format 1_1, first determine the TBS as specified below:

1. 确定Slot内的RE数目

2. 计算信息bit数

$N_{info}=N_{RE}\cdot R \cdot Q_{m}\cdot \upsilon$

If  N_info <= 3824
    Use step 3 as the next step of the TBS determination
Else
    Use step 4 as the next step of the TBS determination
End

3. N_info <= 3824的情况

量化信息bit数

Table 5.1.3.2-1: TBS for N_info <= 3824

Index	TBS	Index	TBS	Index	TBS	Index	TBS
1	24	31	336	61	1288	91	3624
2	32	32	352	62	1320	92	3752
3	40	33	368	63	1352	93	3824
4	48	34	384	64	1416
5	56	35	408	65	1480
6	64	36	432	66	1544
7	72	37	456	67	1608
8	80	38	480	68	1672
9	88	39	504	69	1736
10	96	40	528	70	1800
11	104	41	552	71	1864
12	112	42	576	72	1928
13	120	43	608	73	2024
14	128	44	640	74	2088
15	136	45	672	75	2152
16	144	46	704	76	2216
17	152	47	736	77	2280
18	160	48	768	78	2408
19	168	49	808	79	2472
20	176	50	848	80	2536
21	184	51	888	81	2600
22	192	52	928	82	2664
23	208	53	984	83	2728
24	224	54	1032	84	2792
25	240	55	1064	85	2856
26	256	56	1128	86	2976
27	272	57	1160	87	3104
28	288	58	1192	88	3240
29	304	59	1224	89	3368
30	320	60	1256	90	3496

4. N_info > 3824的情况

不理解？？？

if Table 5.1.3.1-2 is used and ,

the TBS is assumed to be as determined from the DCI transported in the latest PDCCH for the same transport block using . If there is no PDCCH for the same transport block using , and if the initial PDSCH for the same transport block is semi-persistently scheduled, the TBS shall be determined from the most recent semi-persistent scheduling assignment PDCCH. else
the TBS is assumed to be as determined from the DCI transported in the latest PDCCH for the same transport block using . If there is no PDCCH for the same transport block using , and if the initial PDSCH for the same transport block is semi-persistently scheduled, the TBS shall be determined from the most recent semi-persistent scheduling assignment PDCCH.

对于由SI-RNTI加扰的PDCCH所调度的PDSCH，TBS不能超过2976 bits。

对于由P-RNTI或RA-RNTI加扰的PDCCH DCI format 1_0所调度的PDSCH，在上述步骤1-4中的步骤2中需要进行修改，N_info的计算需要乘一个缩放因子S，修改后的计算公式为：

${N_{info}} = S \cdot {N_{RE}} \cdot R \cdot {Q_m} \cdot \upsilon$

缩放因子S：由DCI中的TB scaling字段进行指示，缩放因子与TB scaling的对应关系如下表：

Table 5.1.3.2-2: Scaling factor of Ninfo for P-RNTI and RA-RNTI

TB scaling field	Scaling factor S
00	1
01	0.5
10	0.25
11

2.3 CQI

待整理

3 上行MCS和TBS

3.1 调制阶数和目标码率确定

上行PUSCH场景：

PUSCH scheduled by RAR UL grant
PUSCH scheduled by a DCI format 0_0 with CRC scrambled by C-RNTI, MCS-C-RNTI, TC-RNTI, CS-RNTI
PUSCH scheduled by a DCI format 0_1 with CRC scrambled by C-RNTI, MCS-C-RNTI, CS-RNTI, SP-CSI-RNTI
PUSCH with configured grant using CS-RNTI

PUSCH MCS表格选择(transform precoding disabled)

PUSCH-config -> mcs-Table	configuredGrantConfig -> mcs-Table	DCI	RNTI	Table
qam256		0_1	C-RNTI, SP-CSI-RNTI	Table 5.1.3.1-2
qam64LowSE		USS	No MCS-C-RNTI, C-RNTI, SP-CSI-RNTI	Table 5.1.3.1-3
			MCS-C-RNTI	Table 5.1.3.1-3
	qam256		CS-RNTI	Table 5.1.3.1-2
	qam64LowSE		CS-RNTI	Table 5.1.3.1-3
其他				Table 5.1.3.1-1

PUSCH MCS表格选择(transform precoding enabled)

PUSCH-config -> mcs-TableTransformPrecoder	configuredGrantConfig -> mcs-TableTransformPrecoder	DCI	RNTI	Table
qam256		0_1	C-RNTI, SP-CSI-RNTI	Table 5.1.3.1-2
qam64LowSE		USS	No MCS-C-RNTI, C-RNTI, SP-CSI-RNTI	Table 6.1.4.1-2
			MCS-C-RNTI	Table 6.1.4.1-2
	qam256		CS-RNTI	Table 5.1.3.1-2
	qam64LowSE		CS-RNTI	Table 6.1.4.1-2
				Table 6.1.4.1-1

For Table 6.1.4.1-1 and Table 6.1.4.1-2, if higher layer parameter tp-pi2BPSK is configured, q = 1 otherwise q=2.

Table 6.1.4.1-2: MCS index table 2 for PUSCH with transform precoding and 64QAM

MCS Index I_MCS	Modulation Order Qm	Target code Rate R x 1024	Spectral efficiency
0	q	60/q	0.0586
1	q	80/q	0.0781
2	q	100/q	0.0977
3	q	128/q	0.1250
4	q	156/q	0.1523
5	q	198/q	0.1934
6	2	120	0.2344
7	2	157	0.3066
8	2	193	0.3770
9	2	251	0.4902
10	2	308	0.6016
11	2	379	0.7402
12	2	449	0.8770
13	2	526	1.0273
14	2	602	1.1758
15	2	679	1.3262
16	4	378	1.4766
17	4	434	1.6953
18	4	490	1.9141
19	4	553	2.1602
20	4	616	2.4063
21	4	658	2.5703
22	4	699	2.7305
23	4	772	3.0156
24	6	567	3.3223
25	6	616	3.6094
26	6	666	3.9023
27	6	772	4.5234
28	q	reserved
29	2	reserved
30	4	reserved
31	6	reserved

3.2 TBS确定

上先行基本一致